My gf was nice enough to get me a 4gig class 2 sd card...I was wondering if there were any downsides to me having this and if any could then be fixed withough having to get a class 6 which from my searches and reading in the forums if a really good investment.
your class 2 card will just not be as fast, but it still usable.
holmes901 said:
My gf was nice enough to get me a 4gig class 2 sd card...I was wondering if there were any downsides to me having this and if any could then be fixed withough having to get a class 6 which from my searches and reading in the forums if a really good investment.
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Click to collapse
downsides is..class 2 wont run roms as fast as class 6. but still pretty much usable
4gig class 6 on newegg.com is now about 14 after shipping
sd cards and class ratings
The problem with sd cards, are that the rated class is often way off. They often perform much better.
For example, I have two kingston class 5 cards, that have read speeds at 12.5MB/sec, and one Sandisk class 4 with read speeds at >16MB/sec.
As comparison, I have a no-name class 6 that barely reads at 8MB/sec.
All three brand name cards also writes faster than the no name class 6. So why they are rated class 4 and not 6 is a mystery to me.
Ideally, we should have a thread where people posted the read/write speed of their sd crads, and included a link to where you bought it from. Mymemory.co.uk is a good place to get them from, in my expoerience. Does anyone know of online shops shipping worldwide that actually states the r/w speed of the cards? Or better yet, a table/wiki with this information?
To answer OPs question though: Class 2 will probaby be slow with Hero-roms or apps2sd. But you cn always test it and see how well it performs. I imagine reading speed is most important.
naguz said:
The problem with sd cards, are that the rated class is often way off. They often perform much better.
For example, I have two kingston class 5 cards, that have read speeds at 12.5MB/sec, and one Sandisk class 4 with read speeds at >16MB/sec.
As comparison, I have a no-name class 6 that barely reads at 8MB/sec.
All three brand name cards also writes faster than the no name class 6. So why they are rated class 4 and not 6 is a mystery to me.
Ideally, we should have a thread where people posted the read/write speed of their sd crads, and included a link to where you bought it from. Mymemory.co.uk is a good place to get them from, in my expoerience. Does anyone know of online shops shipping worldwide that actually states the r/w speed of the cards? Or better yet, a table/wiki with this information?
To answer OPs question though: Class 2 will probaby be slow with Hero-roms or apps2sd. But you cn always test it and see how well it performs. I imagine reading speed is most important.
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Click to collapse
Sandisks are on average the fastest of the flash memory cards... and i believe you pay a slight premium for it? i have one, but from amazon for like $30 so idk
I currently run an 8 gig class 4 card by PNY with a one gig partition for my apps. It's been slowing down lately (because I'm using nearly half of it). Gonna get my wife to get me a 16 gig class 6 card next month.
I had a classless 2 gb card and it runs just the same as this sandisk 8gb class 6.
I don't see what everyone talks about. I tried them both on cm 4.0.4 and now with this new CM and I don't see a significant difference.
I'm running like 7 widgets all over the 5 pages.
Maybe I just can't tell...
Ssantos6981 said:
I had a classless 2 gb card and it runs just the same as this sandisk 8gb class 6.
I don't see what everyone talks about. I tried them both on cm 4.0.4 and now with this new CM and I don't see a significant difference.
I'm running like 7 widgets all over the 5 pages.
Maybe I just can't tell...
Click to expand...
Click to collapse
yeah it seems that the classless cards, although slower on file transfers, are not maximizing bandwidth with swap and stuff so looks like it's even... and only SDHCs have a class looks like. my stock G1 card worked fine but crashed a few times with apps2sd... running hero is probably why though.
The class refers to the minimum read/write speed necessary for continuous streaming of information, not the maximum read/write speed (more important for digital cameras and camcorders than our devices). The common misconception is that a class 6 card is faster than a class 2 card. You have to be aware of the MAXIMUM read/write speed which will tell you which performs better: ie- you may have a class 2 with a higher read/write speed than the class 6 which would make the class 2 faster.
ofsinreno said:
The class refers to the minimum read/write speed necessary for continuous streaming of information, not the maximum read/write speed (more important for digital cameras and camcorders than our devices). The common misconception is that a class 6 card is faster than a class 2 card. You have to be aware of the MAXIMUM read/write speed which will tell you which performs better: ie- you may have a class 2 with a higher read/write speed than the class 6 which would make the class 2 faster.
Click to expand...
Click to collapse
that usually happens when people get a lower-quality/class Class 6 card thinking they're all fast... fact is, Sandisk makes the Class 6 Mobile Ultras which get 16mb/s average and maxxed at 24mb/s once for me while some crappy Class 6's might just get the bare minimum for Class 6: 6 mb/s
I have been following xda-developers since I unlocked my first at&t tilt, and people are always making that mistake! Just look up any HERO ROM and they will require "Class 6 micro-SD Card"! The fact is the class is not a potential speed rating, whether it is 2 or 6 or even 10! The class # refers to the lower limit of the device that is using the card, not the capability of the card. For example, if your device is capable of writing at 12Mb/s then you can use any class card rated at 12Mb/s regardless of whether it is a class 2 or class 6 and neither will be faster. Conversely if your device is only capable of writing at 4Mb/s then you cannot use a calss 6 card because the class 6 card requires a device to write continuously at lease 6Mb/s. Most people think that a class 6 card is labeled "class 6" because it is guaranteed to read/write at least 6Mb/s and a class 2 is labeled "class 2" because it is guaranteed to write at least 2Mb/s; but that is not true. The speed rating is not the same as the class rating. They have very little to do with one another.
Related
My Hero came with a 2GIG card ( I'm not sure what class ) - it was fine but too small.
After a bit of research, I found that the higher the class the faster the card ( ie class 6 is a faster card than class 2 etc ).
I formatted the new card in the phone.
So I copied all my old card files to my computer, then copied them over to the new card.
Put in the new 8GIG card in my phone and it mounted no problem and I had all my music and photos.
BUT -
As I can see, it seems to be a lot slower than my old card. If I go to my photo album, it will load as a preveiw grid. This used to happen pretty quickly, but on the new card, the grid squares are grey, and then start to load up with the photo images.
Any ideas why and ways to fix this?
cheers all
did you buy the new card from an auction site? I hate to suggest it, but there are a lot of fakes around...
J-Zeus said:
After a bit of research, I found that the higher the class the faster the card ( ie class 6 is a faster card than class 2 etc ).
Click to expand...
Click to collapse
Errhhh, this is actually incorrect.
All the class means is that your card is guaranteed to write at certain minimum speeds.
Class 2 - 2mb/s
Class 4 - 4mb/s
Class 6 - 6mb/s
So, if you buy a genuine class 6 card, you are guaranteed that it will write at 6mb/s but that doesn't preclude it from operating faster than this minimum.
A good quality class 4 will often write at 11 or 12 mb/s, more than double the class 6 minimum. You can expect that a good quality class 2 or class 4 will often outperform the class 6 minimum, whereas as poor quality class 6 will perform far closer to its minimum requirement.
When buying an SD card, don't just look at the class - look for independent reviews. For example, http://www.davidgilson.co.uk/2008/12/follow-up-another-micro-sdhc-card/, which shows a class 2 card running at speeds well in excess of class 6 minimums.
Regards,
Dave
This is another case of the Hero having problems with certain SDHC cards.
The thumbnails for the Album are not being created and stored for some reason, and i can almost guarantee this is what's happening to you.
I've had to go back to using my old 2gb for now, as my 8gb Sandisk Mobile Ultra Class 6 was performing poorly when viewing my photo albums. We're still trying to work out why the Hero is not liking these newer cards...
I'm watching with interest....
foxmeister said:
When buying an SD card, don't just look at the class - look for independent reviews. For example, http://www.davidgilson.co.uk/2008/12/follow-up-another-micro-sdhc-card/, which shows a class 2 card running at speeds well in excess of class 6 minimums.
Regards,
Dave
Click to expand...
Click to collapse
How sad, I should have noticed this before. Having read your article, I immediately test my two SDHC cards. The finding changes my fundamental view on class numbers:
Transcend Micro SDHC, 8G, Class 6: 9.1MB
Sandisk Micro SDHC, 8G, Class 4: 14.9MB
Note 1: The Transcend card is from someone who sold me a second hand Google G1.
Note 2: The Sandisk card came with a tiny red reader (Like this), bought in Hong Kong
The speed test is carried out using the Sandisk reader in conjuction with the card benchmark software called "ATTO". To my surprise, the read/write speed of this tiny reader is, amazingly, faster than the internal card reader.
That would be this issue.
Still no real solution yet, but its not an exclusive problem.
I manage a consumer electronics store and a lot of people seem to be misinformed when shopping for memory cards for new mobile devices. After spending a year or so on this site it seems many people here are misinformed as well- so I thought I would open up a discussion.
When looking at memory cards (micro in this case; but most follow the same format) there are 3 important pieces of information to review.
1. Capacity- some people will do fine with a 1gig card while others use their device to store music, movies, and pictures and need more space. At the time of this post the largest micro-SD card available (as far as I know) is 16gig.
2. Speed rating- obviously you want the most performance you can get out of a memory card so any information stored on that card can be accessed quickly, and with so many new ROM's running apps from the SD card the transfer needs to be both fast and efficient. Most cards offer anywhere from 6mb/sec to 15mb/sec (with other types of flash speeds near the 45mb/sec range). The speed rating is a rating of the MAXIMUM READ/WRITE SPEED capabilities, and is often difficult to find on the product info- even more difficult to measure.
3. Class rating- is the most misunderstood rating of all- and the most advertised (the class rating is written on the front of most cards). The class rating IS NOT a measure of how fast information can be accessed from the card by the device. Most people believe that a class 2 card is guaranteed to read/write at 2mb/sec while a class 6 is guaranteed to read/write no slower than 6mb/sec, the next logical step is to believe that a class 6 card will be faster and more efficient than a lower class. THIS IS NOT TRUE. What the class rating is actually defining is whether or not the card will work in your device. A class 6 card will only function properly in a device that can SUSTAIN a write/read speed of 6mb/sec. Where a class 2 card (with the same speed rating) will work in any device that can write at least 2mb/sec or more; and will do so AT THE SAME SPEED AS THE CLASS 6.
Many people believe that the discrepency lies in the branding of the card, for example some say that no-name brands will produce a substandard card and call it a "class 6", which will result in lower transfer speeds. Again, this is not true. The class rating HAS NOTHING TO DO WITH HOW FAST THIS CARD WILL PERFORM. If your device reads/writes at 15mb/sec it will perform the same with a class 2 as it will with a class 6. The only time class ratings matter is if you have a device (usually a digital camera) that writes slower than 6mb/sec- which the G1 does not.
I don't understand why ROM developers (and no disrespect intended, I have an unbelieveable respect for devs) make a notation that HERO ROM's need a class 6 memory card to function. We sell 16gig Sandisk microSD cards with a class 4 rating, and I constantly get customers who tell me they are going to wait for Sandisk's class 6 16gig microSD card. As of today Sandisk has no intention of making a class 6 16gig microSD card. And if they did, it would not be any faster than the class 4 that is currently available.
This is the information I have gathered by speaking to the Sandisk and Delkin engineering departments as well as countless searches, and I hope it saves someone some $$- which is my intent.
hmm.. your post does not quite make sense.. so you say a class 2 card in a G1 performs equally fast as a class 6. And that class rating has nothing to do with card speed....
A bit hard to believe....
ofsinreno said:
I manage a consumer electronics store and a lot of people seem to be misinformed when shopping for memory cards for new mobile devices. After spending a year or so on this site it seems many people here are misinformed as well- so I thought I would open up a discussion.
When looking at memory cards (micro in this case; but most follow the same format) there are 3 important pieces of information to review.
1. Capacity- some people will do fine with a 1gig card while others use their device to store music, movies, and pictures and need more space. At the time of this post the largest micro-SD card available (as far as I know) is 16gig.
2. Speed rating- obviously you want the most performance you can get out of a memory card so any information stored on that card can be accessed quickly, and with so many new ROM's running apps from the SD card the transfer needs to be both fast and efficient. Most cards offer anywhere from 6mb/sec to 15mb/sec (with other types of flash speeds near the 45mb/sec range). The speed rating is a rating of the MAXIMUM READ/WRITE SPEED capabilities, and is often difficult to find on the product info- even more difficult to measure.
3. Class rating- is the most misunderstood rating of all- and the most advertised (the class rating is written on the front of most cards). The class rating IS NOT a measure of how fast information can be accessed from the card by the device. Most people believe that a class 2 card is guaranteed to read/write at 2mb/sec while a class 6 is guaranteed to read/write no slower than 6mb/sec, the next logical step is to believe that a class 6 card will be faster and more efficient than a lower class. THIS IS NOT TRUE. What the class rating is actually defining is whether or not the card will work in your device. A class 6 card will only function properly in a device that can SUSTAIN a write/read speed of 6mb/sec. Where a class 2 card (with the same speed rating) will work in any device that can write at least 2mb/sec or more; and will do so AT THE SAME SPEED AS THE CLASS 6.
Many people believe that the discrepency lies in the branding of the card, for example some say that no-name brands will produce a substandard card and call it a "class 6", which will result in lower transfer speeds. Again, this is not true. The class rating HAS NOTHING TO DO WITH HOW FAST THIS CARD WILL PERFORM. If your device reads/writes at 15mb/sec it will perform the same with a class 2 as it will with a class 6. The only time class ratings matter is if you have a device (usually a digital camera) that writes slower than 6mb/sec- which the G1 does not.
I don't understand why ROM developers (and no disrespect intended, I have an unbelieveable respect for devs) make a notation that HERO ROM's need a class 6 memory card to function. We sell 16gig Sandisk microSD cards with a class 4 rating, and I constantly get customers who tell me they are going to wait for Sandisk's class 6 16gig microSD card. As of today Sandisk has no intention of making a class 6 16gig microSD card. And if they did, it would not be any faster than the class 4 that is currently available.
This is the information I have gathered by speaking to the Sandisk and Delkin engineering departments as well as countless searches, and I hope it saves someone some $$- which is my intent.
Click to expand...
Click to collapse
Sigh... read this.
See how it says the Class Rating is the minimum read/write speed? Crazy that you would say it has nothing to do with speed. One thing though, manufacturers rarely advertise the MAX speed of the cards, which is why some Class 4 cards are equal or greater than some Class 6, also attributed to manufacturers claims of speed not being substantiated.
Insert foot in mouth, walk away.
Wow, so much misinformation there.
http://en.wikipedia.org/wiki/Secure_Digital
SD Cards and SDHC Cards have Speed Class Ratings defined by the SD Association. The SD Speed Class Ratings specify the following minimum write speeds based on "the best fragmented state where no memory unit is occupied"
Edit: Damn, daveid beat me to it.
The minimum write speed that defines the class rating is not the minimum speed the card is guaranteed to read/write, but the minimum speed a device that can be used. If your device only writes at 4mb/sec you must use a class 4 or lower.
http://kb.sandisk.com/app/answers/d...ce between speed and class rating/r_id/101834
ofsinreno said:
The minimum write speed that defines the class rating is not the minimum speed the card is guaranteed to read/write, but the minimum speed a device that can be used. If your device only writes at 4mb/sec you must use a class 4 or lower.
http://kb.sandisk.com/app/answers/d...ce between speed and class rating/r_id/101834
Click to expand...
Click to collapse
If you read the page you quoted, you would understand how you are wrong.
Speed Class is a minimum speed based on a worst case scenario test.
Click to expand...
Click to collapse
Unlike card write speeds that measure maximum performance, class ratings measure the minimum sustained speed required for recording an even rate of video onto the card. The class rating number corresponds to the transfer rate measured in megabytes per second. Class 2 cards are designed for a minimum sustained transfer rate of 2 megabytes per second (MB/s)1, while Class 10 cards are designed for a minimum sustained transfer rate of 10MB/s2.
Click to expand...
Click to collapse
I would read that again if I were you.
It is saying that if you have a camcorder that requires a class 4 card and you put in a class 2, it may not function correctly.
Lower speed card in a camera that requires a higher speed = bad
Higher speed card in a camera that requires a lower speed = good
I know the wording is a bit confusing on this issue. I had to call the tech support line at Sandisk when we first got the 16G class 4 cards myself to find out what the difference was. As a manager it is my responsibility to know what our customers need before issues arise. The explanation I am providing is the explanation I was given by both the tech support associate and the engineer I was later able to speak with. When I called Delkin to ask the same question I was told the same thing. If my information is incorrect I am sorry but it came directly from the horse's mouth.
I posted "A discussion"- at least we have that! I love xda
What you are saying doesn't make any sense. By your logic a class 2 card would actually be better than a class 6. If that was true, why are they cheaper.
ofsinreno said:
I know the wording is a bit confusing on this issue. I had to call the tech support line at Sandisk when we first got the 16G class 4 cards myself to find out what the difference was. As a manager it is my responsibility to know what our customers need before issues arise. The explanation I am providing is the explanation I was given by both the tech support associate and the engineer I was later able to speak with. When I called Delkin to ask the same question I was told the same thing. If my information is incorrect I am sorry but it came directly from the horse's mouth.
I posted "A discussion"- at least we have that! I love xda
Click to expand...
Click to collapse
The problem with your argument is that based on your logic the following scenario would result in poor performance.
Let's just say I have a digicam that can only sustain a max write speed of 6mb/s. I purchase a class 10 card for it (because it is on sale, and has a bigger number).
Based on your explanation, that would result in worse performance than getting a class 6 card, or that it would not work at all.
However, class ratings have nothing to do with the Standard that SD is built on (and MicroSD), this standard requires devices to be compatible (the newer SDHC classification is an extension on the original SD standard that allows for higher capacity, this requires two devices that are SDHC compatible). ANY SD or MicroSD card should be compatible with ANY device that supports SD or MicroSD (respectively, and of course minding the HC requirements if needed).
In fact, the Class 10 card WILL work in a device that can only sustain 6mb/s speeds. Not only will it work, it will work just as well as the Class 6 would. But, it will provide better transfer speeds when utilized in a card reader or other device. Thus, making it the better choice.
ofsinreno said:
I know the wording is a bit confusing on this issue. I had to call the tech support line at Sandisk when we first got the 16G class 4 cards myself to find out what the difference was. As a manager it is my responsibility to know what our customers need before issues arise. The explanation I am providing is the explanation I was given by both the tech support associate and the engineer I was later able to speak with. When I called Delkin to ask the same question I was told the same thing. If my information is incorrect I am sorry but it came directly from the horse's mouth.
I posted "A discussion"- at least we have that! I love xda
Click to expand...
Click to collapse
So very generally (this doesn't apply to all cards, but probably a majority of them.) A Class 4, 100x card (if such a card existed) would probably sustained write to the card at 5MB/s and sustained read from the card at about 14MB/s. While a Class 6, 66x card would probably sustained write to the card at around 7MB/s and sustained read from the card at around 9MB/s. I can make this generalization because most of the time (not always though) reading from a microSDHC card is faster than writing.
But here is the kicker, a class 6 SDHC card is the maximum class at this time. Some class 6 cards could actually be "Class 10" if it existed. My class 6 SanDisk 8G would be one of these cards. I have benchmarked it at a sustained ~14MB/s write and ~20MB/s read. So that is why people are waiting for SanDisk Class 6 cards. Because generally, SanDisk class 6 cards are a lot higher spec than they need to be in order to satisfy the current class ratings.
However like daveid said, the speed ratings are rarely put on SDHC cards. Only class ratings.
So, I said all of that to say this. If I needed a card for my camera (which the write speed is important,) I would pick the class 6 card in the example. If I needed a card for my music player for my truck (in which read times are the most important) I would get the class 4 in the example above.
However, in the real world, since the X rating is rarely specified, I would play it safe and get the class 6 rated card in both examples.
t1n0m3n said:
So very generally (this doesn't apply to all cards, but probably a majority of them.) A Class 4, 100x card (if such a card existed) would probably sustained write to the card at 5MB/s and sustained read from the card at about 14MB/s. While a Class 6, 66x card would probably sustained write to the card at around 7MB/s and sustained read from the card at around 9MB/s. I can make this generalization because most of the time (not always though) reading from a microSDHC card is faster than writing.
But here is the kicker, a class 6 SDHC card is the maximum class at this time. Some class 6 cards could actually be "Class 10" if it existed. My class 6 SanDisk 8G would be one of these cards. I have benchmarked it at a sustained ~14MB/s write and ~20MB/s read. So that is why people are waiting for SanDisk Class 6 cards. Because generally, SanDisk class 6 cards are a lot higher spec than they need to be in order to satisfy the current class ratings.
However like daveid said, the speed ratings are rarely put on SDHC cards. Only class ratings.
So, I said all of that to say this. If I needed a card for my camera (which the write speed is important,) I would pick the class 6 card in the example. If I needed a card for my music player for my truck (in which read times are the most important) I would get the class 4 in the example above.
However, in the real world, since the X rating is rarely specified, I would play it safe and get the class 6 rated card in both examples.
Click to expand...
Click to collapse
I've got the same Sandisk card they're freakin BEAST!!! speed ratings over class ratings seriously. oh wait they have money to make
OK, I don't mind admitting that my foot often finds its way to my mouth. I logged onto a training site we use at work and found this:
"Read/Write speed is the maximum sequential speed that data can be written to the memory card ("write speed") and transferred to a host device ("read speed")."
and this
"Speed class is not a measure of the top sustained speed of an SD/SDHC memory card. The current SD/SDHC memory card speed classes are generally rated as class 2, class 4, or class 6. "
and this
"Usually standard definition camcorders require only a Speed Class 2 rating
Generally standard definition camcorders will not benefit by using higher class 4 or above memory card products
and this
"Maximum read / write speed (MB/sec), not class speed, is the critical number for you and your customers who want to take photos"
Taking the information given to me by the company representatives and applying this Sandisk Training information I came up with the information I posted earlier. And I thought that people were being misled into spending more $$ than necessary.
Thanks for the discussion, now I understand
It is great to help people reach a higher understanding of things!
And I am glad you saw our input as that, instead of getting hurt feelings like some people do.
I'm sorry I'm so late to this conversation, but is there anything wrong with getting a class 10 mSDHC card that is going to be partitioned? I wouldn't think so... but I wouldn't want to spend the money and realize that the ext partitions do not work with a class 10 card. Has anyone tried this? Results? Noticeable performance shift?
Jeliz187 said:
I'm sorry I'm so late to this conversation, but is there anything wrong with getting a class 10 mSDHC card that is going to be partitioned? I wouldn't think so... but I wouldn't want to spend the money and realize that the ext partitions do not work with a class 10 card. Has anyone tried this? Results? Noticeable performance shift?
Click to expand...
Click to collapse
lol^^ i was about to ask the same exact thing....cus I got my eye on the new Kingston 10 class 16gb card right now...but haven't heard too much talk about it, so I figured I'd wait until more people purchase and give feedback before I spend that $100.
also, has anyone ever used a "Centon" sdcard? Unfamiliar name to me, I usually buy Sandisk or Transcend.....but I took a risk and purchased a 16gb Class 6 Centon sdcard yesterday in TigerDirect. Cost me $74! Have not opened it yet, and I still have the receipt....any suggestions?
Personally I would wait until "Class 10" becomes an official SD Association speed class. You never know, they may spec other classes like "Class 12" or "Class 14" at that time as well. However, for the G1, you will probably not get any performance increase over a Class 6. A fast Class 6 pretty much maxes out the G1's capabilities as of right now.
So unless you are getting the new card to put into an adapter and push large file directly to the card (bypassing the G1) I would hold off getting the expensive "Class 10" card until more info is given. (I.E. an official SD Card Specification Ver.3.0 is released.)
hi, I have a question related with the SD card. I also have a Class 6 8G card, but I can't use adaptor to read it on my card reader. The card reader is a bit old. It's a kind of 6-in-1 reader and I usually read my CF card from DSLR camera on it and till now it's working fine. However, ever since I purchased this microSD card, I can't read it on the card reader. everytime I put it into the adapter and inserted it in the card reader, it will cause the card reader malfunction. nothing can be read and the LED on the reader just die.
Is it because the reader can't support it or the adapter can't? I can only use the phone to read the card now.
zhourj said:
hi, I have a question related with the SD card. I also have a Class 6 8G card, but I can't use adaptor to read it on my card reader. The card reader is a bit old. It's a kind of 6-in-1 reader and I usually read my CF card from DSLR camera on it and till now it's working fine. However, ever since I purchased this microSD card, I can't read it on the card reader. everytime I put it into the adapter and inserted it in the card reader, it will cause the card reader malfunction. nothing can be read and the LED on the reader just die.
Is it because the reader can't support it or the adapter can't? I can only use the phone to read the card now.
Click to expand...
Click to collapse
Do you have it partitioned with an ext file system? If so then windows has a hard time recognizing this. Its better to just mount your mSDHC from your phone instead of trying to mount it through a card reader.
yes, I did have ext file system on it , but also fat 32. I got another newer reader and it can read the fat 32 partition. I think the other one just being too old and can't read the sdhc card . it's too large for it.
http://forum.xda-developers.com/showthread.php?p=6973962#post6973962
^inspired by that HD2 thread... i bought a new trascent microSD class 6 card and copied all my sandisk class 2 card's content over (yes 14GB, basically almost full) and the class 6 just kills the class 2 performance.
i mean... it's not like going to a NEW phone fast, but it's noticeably faster when accessing in terms of loading/saving them! pretty unbelievable!
anyway, just wanted to share it if you guys are still on Hermes like me. besides you can keep carrying it forward to newer devices that support class 6 or 10 microSD cards it's pretty good until SDXC becomes cheaper and more common place.
Yeah, that's quite logical... I mean, the Class 2 performance is equal to 16mbps of transfer speeds (around 2 MB/s) and Class 6 is equal to some 48mbps (6 MB/s). That's three times faster. My microSDHC 8GB is also Class 6. Is it possible to use a Class 10 memory card with Hermes?
well i dunno how this works really. by its virtue having a SDHC/SD capable standard card readers shouldn't it read ALL the classes and perform to that class?
r34c7 said:
Yeah, that's quite logical... I mean, the Class 2 performance is equal to 16mbps of transfer speeds (around 2 MB/s) and Class 6 is equal to some 48mbps (6 MB/s). That's three times faster. My microSDHC 8GB is also Class 6. Is it possible to use a Class 10 memory card with Hermes?
Click to expand...
Click to collapse
I just got myself a Class 6 16GB recently; and yes, it's insanely fast.
hello i just got an amaze and with its camera and video quality i think i need a better sd card as my current one is class 2. any recommendations and letting me me know what the phone can handle without paying for more than i need would be greatly appreciated.
thanks very much
The Amaze can handle a class 10 memory card. This would be preferred as it has the fastest read and write speed that I know of. I am currently using a 16GB class 6 SanDisk and it works really well.
Hope this is helpful. Or maybe someone else can give you more info.
Sent from my world to yours using an HTC Amaze
windcan said:
hello i just got an amaze and with its camera and video quality i think i need a better sd card as my current one is class 2. any recommendations and letting me me know what the phone can handle without paying for more than i need would be greatly appreciated.
thanks very much
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This should do the trick.
http://www.amazon.com/AmazonBasics-...H4U0/ref=sr_1_2?ie=UTF8&qid=1325371114&sr=8-2
Looks like it may be worth it to go straight to class 10.
Thanks
PNY class 10.
Sent from my HTC Amaze 4G using xda premium
I just got a Samsung 32gb class 10 and it works great.
what is "PNY"?
windcan said:
what is "PNY"?
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PNY is just a brand
Picked up a Lexar 32gb class 10 for $45 on boxing day. (for you Americans, that's the day after Christmas)
lol
marleyfan61 said:
Picked up a Lexar 32gb class 10 for $45 on boxing day. (for you Americans, that's the day after Christmas)
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Sent from my HTC Amaze 4G using XDA Premium App
Confused
My Amaze is on it's way to my door this Wednesday, and I too am on the hunt for a good class 10 micro SD card. I had a Patriot 32 GB ordered from Amazon (it had 4+ stars), but then I started reading specific user ratings. It almost looks as though there is a problem with quality/consistency with many of the 32GB class 10s. The Patriot, and several others, had quite a few recent users complain that their class 10 doesn't run any faster then their old class 2 or 4. (The complaints I tried to focused on are from users who had run speed tests and didn't just provide seat-of-the-pants analysis.) Admittedly, I was going for as cheap as I could (the Patriot was only $47), but I looked at several others and they had spotty speed comments as well.
Does anyone have specific knowledge or insight on this? Is it an issue with lower cost manufacturers whereby one card is great but the next can be dreadful. Is it the nature of the beast?
I appreciate your comments.
A class 10 card isn't the way to go with smartphones. Best to get a class 4.
Sharpshooterrr said:
A class 10 card isn't the way to go with smartphones. Best to get a class 4.
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really, class 4, why?
too late for me, order my 32gb class 10
curious to understand this whole thing
thanks
Sharpshooterrr said:
A class 10 card isn't the way to go with smartphones. Best to get a class 4.
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I could understand saying a class 10 isn't necessary, but to say it isn't the way to go, a class 4 is best doesn't make sense. Care to explain why?
UHS-1 Cards
I just read where UHS-1 class microSD's "were made for mobile devices". Something about being specifically designed to work with those operating systems. Anyone have experience with any of those? They're awfully expensive.
If you uses a class 2 SD card with a capacity of less than 16Gb and mostly uses it to transfer small files between your phone and PC - that would be sufficiency enough.
If you intend to use a bigger card, say, 32Gb or 64Gb and you are doing a lot of transferring MP3, movies, pictures ect ... especially if moving BIG files, say, more than 1 Gb each (e.g a full MP4 movie may take up to almost 2Gb)
OR
You are frequently backup your SDCard contains and moving them between PC and phone. You will appreciates the higher speed/class of your SDCard. Higher class means higher speed in reading and writting hence saving you a lot of time.
You will not notice much differences between a class 2 and a class 10 card when using it inside your phone though.
An SDCard speeding test's result will be differ from devices and that's exactly manufacturer's stated on their package/info, but, basically you got what you paid for. As we all know, Sandisk is the most expensive card out there and there is a reason for it, just do a little research and you'll know why. Sandisk classed their card at the minimum speed that their cards are capable of, whereas other manufacturer tend to class their card at the average speed that their cards capable of. Meaning a classs 10 Samsung/PNY/Patriot card may not capable of reaching the claimed speed (because, well, results are varies on devices) and the result maybe a little lower than claimed (I've tried Samsung class 10 and PNY class 10 test and the result is somewhere more or less than 9Gb/s writting).
Anyway, a class 2 16Gb Sandisk card is good enough for an average user whereas a higher class/capacity card will increase performances for those who demand more for their task/hobbies/usage
I would agree with the post above, right on the spot. I had a 8 gb class 4, 16 gb class 4, and now 32gb class 10. Did not visibly notice speed in my phone but did notice it when transferring files. You will only benefit when transferring larger files like 1 gb or more.
I only transfer my recorded videos, pictures, mp3 and that's it. I think i once transferred a movie or two.
What would have taken me 1 hr on 16 gb class 4 took me 20 - 30 min on my patriot 32 gb class 10. No problems on it since nov so far.
Sent from my HTC Amaze 4G using xda premium
Sharpshooterrr said:
A class 10 card isn't the way to go with smartphones. Best to get a class 4.
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I have a class 4 card and the video is choppy when using HD recording. It can't write the larger amount of data fast enough.
A class 10 FTW
marleyfan61 said:
I could understand saying a class 10 isn't necessary, but to say it isn't the way to go, a class 4 is best doesn't make sense. Care to explain why?
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http://www.xda-developers.com/android/32-gb-micro-sd-analysis-speed-test/
anything over class 4 sacrafices random read/write speeds...meaning, just to write faster the data is more fragmented. Over time, the speed becomes slower and the table used to keep track of data must access parts of the fragments that are free...this reduces performance in higher class cards...if you look at Sandisk they their class two performs way above the minimum write speed, almost double...I always buy sandisk...nothing else...their quality is unmatched...they are the pioneers...A class 4 or class 6 sandisk would outperform many of the class 10's that people are buying right now.
Sometimes as Binary's card has, they lose integrity because of this reason...the index becomes messed up and the data becomes lost eaiser in higher class SD cards and lower quality SD cards...I believe Sandisk tries to minimize this even in their higher speed cards...
---------- Post added at 05:56 AM ---------- Previous post was at 05:34 AM ----------
If you guys take a look at the bitrate of the 1080p video and also add the audio bit rate it doesn't even come close to being 2 MB/s write speed which is a class 2 SD card...the highest bitrate for video I got was 11182 (kilobits per second) = 1.36499023 megabytes per second...add the 127kbps of sound and you barely have 1.4 MB/s write speed needed for the HD video recorded by our amaze...hope this clears things up.
...to run optimally while recording video/taking pics?
Or can you get by with a lesser class (6) or so?
Just wondering what everyone is using and why.
I have a 32GB class 4 SanDisk and it works great.
Sent from my Energized Amaze
I also have a 32gb class 4 (SanDisk). I haven't noticed any lag when picture taking or video recording.
I was looking up what kind of MicroSD to get my Amaze about a month ago and decided to get this one. Here are some things I picked up while doing the research.
1. Small read/writes usually takes place on the SD cards. Getting a class 10 with good write speeds for large files doesn't mean good speeds with small files.
2. SanDisk is a good brand. Mine is advertised as a class 4 but performs at class 6.
3. If you're looking at the Patriot class 10 microSD, I recommend that you stay away from it. People have been reporting errors with that card on Android devices. Patriot said that they've fixed the issue, but there are still a lot of bad cards floating around. You never know what you get.
4. If you do go with SanDisk, get it from a reputable dealer (not eBay). There are tons of SanDisk counterfeits.
Thanks so far guys - exactly the input and information I was seeking.
I have a 8g Class 6 from my G2, and a 4g Class 10 I paid $6 for to test out - both by Transcend off newegg.
Will get something with more capacity soon, and was wondering which direction to head.
I just got a patriot 16gb class 10 about a week or two ago from newegg for $10 ($20 with a $10 rebate) and it's awesome. I mostly notice it when transferring files (videos and music) between my phone and laptop. I had a 16gb class 6 ADATA before this one, but it was only 12gb cuz I originally used it with my G1 and had it partitioned.
My wifi downloads have been quicker lately, but I'm sure that's just coincidence. Anyways, good luck!
Sent from my HTC_Amaze_4G using XDA App
Higher classes are more prone to errors. With the bitrate phone records hd. A class 2 is way more than enough. Go with a class 4 SanDisk. Higher classes have better sequential good for recording movies etc. Lower classes have better random read right and less prone to long term damage. The higher class you go the more risk you'll have of getting corrupt data etc. The only benefit of higher class is better sequential write speeds. ALWAYS GO with sandisk
seansk said:
Higher classes are more prone to errors. With the bitrate phone records hd. A class 2 is way more than enough. Go with a class 4 SanDisk. Higher classes have better sequential good for recording movies etc. Lower classes have better random read right and less prone to long term damage. The higher class you go the more risk you'll have of getting corrupt data etc. The only benefit of higher class is better sequential write speeds. ALWAYS GO with sandisk
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If I had known this sooner, I wouldn't have invested in a 32GB Class 10 disk (not sandisk). So far, I've had it crash twice, and had to reformat every time. It's rather annoying and you do lose all your data; so for those out there still considering it, please add this to your factors of consideration.
16 GB class 6 SanDisk. No lag. No problems.
Sent from my HTC_Amaze_4G using XDA App
daeboe said:
If I had known this sooner, I wouldn't have invested in a 32GB Class 10 disk (not sandisk). So far, I've had it crash twice, and had to reformat every time. It's rather annoying and you do lose all your data; so for those out there still considering it, please add this to your factors of consideration.
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Always buy sandisk. I have not heard of any sandisk going bad but heard of all other brands going corrupt over and over. I don't believe sandisk has a class 10 or class 8. They always stick to stability and quality and is worth the price. Besides a class 4 sandisk usually outperforms a class 6 or 8 of other brands. Search for my posts regarding memory topics in accessories I talk about sequential read write and random read write and how the bit rate our phone records video in HD is waaaay below even a class 2. a good balance of sequential read write (long files such as videos or movies) and random read write (gigs of small files) is either a class 4 or class 6 if i was going to go allout I would get the new 64gig card made by sandisk for mobile phones. I think its a class 6
seansk said:
Always buy sandisk. I have not heard of any sandisk going bad but heard of all other brands going corrupt over and over. I don't believe sandisk has a class 10 or class 8. They always stick to stability and quality and is worth the price. Besides a class 4 sandisk usually outperforms a class 6 or 8 of other brands. Search for my posts regarding memory topics in accessories I talk about sequential read write and random read write and how the bit rate our phone records video in HD is waaaay below even a class 2. a good balance of sequential read write (long files such as videos or movies) and random read write (gigs of small files) is either a class 4 or class 6 if i was going to go allout I would get the new 64gig card made by sandisk for mobile phones. I think its a class 6
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I had to send my 32gb class 10 Sandisk in to get replaced because of data corrpution. I agree though, Sandisk is great.
I have a Samsung class 2 8gb. Pretty good for waht I use it
Sent from my HTC_Amaze_4G using xda premium
I have SanDisk 16GB Class 2, I bought a class 10 and its actually slower than my Class 2. Plus yes, it's more prone to error. My previous android phone would freeze up because of the class 10. Moral of story: SanDisk has great speeds even on class 2
Sent from my HTC Amaze 4G using XDA App
Binary100100 said:
I had to send my 32gb class 10 Sandisk in to get replaced because of data corrpution. I agree though, Sandisk is great.
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sandisk doesn't make class 10's or 8's, but It could be imported or something or maybe even a knockoff...the only way to make sure you have a sandisk is to call them and ask if they actually sell class 10, to my knoweldge the fastest microsd they sell is a class 6. can you point me to their webiste or somewhere, I am very interested. they do sell class 10 SD but not micro sd. I am very curious where you got this and how sandisk is actually replacing this...I have looked all over for a class 10 micro sd.
you can buy it at newegg: for 120 http://www.newegg.com/Product/Product.aspx?Item=N82E16820171571
or on their webiste for double the price lol: http://www.sandisk.com/products/mobile1-memory-products/sandisk-ultra-microsdxc-card
don't forget to increase your read ahead cache for the sd interface too. 2048K should be the optimal size.