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.
Related
hi!
I want to buy a new microSDHC card.
There is the A-DATA Turbo microSDHC 8GB, Class 6 (AUSDH8GCL6)
the Transcend microSDHC 8GB, Class 6 (TS8GUSDHC6).
the SanDisk Mobile Ultra microSDHC 8GB, Class 4 (SDSDQY-8192-E11M) --> is now Class 4 only? wasn't it class 6? -- http://geizhals.at/a330503.html)
I searched the forums, some say the A-DATA is better and the Transcend is quite slow / buggy - but some also say the A-DATA card is slower and buggy...
Some benchmarks / tests on the Hero would be cool
All I can say is I have a Sandisk 8gb Class 6 MicroSDHC card and it does its job really well.
I'm using a Transcend 16GB Class 6 MicroSDHC and is performing quite well.
Does the SD class impact much on the speed of the phone?
Thanks
Phil
I've managed to convince myself it does, I've noticed my phone has been more responsive since upping to a Class 6 card.
I've seen people say that the swapfile is on SD, hence why it seems more responsive. However, knowledgable people have replied that the swapfile is not on the SD, and it can't.
It will obviously speed up anything that accesses the card, though
oprisnik said:
microSDHC 8GB, Class 4 (SDSDQY-8192-E11M) --> is now Class 4 only? wasn't it class 6? -- http://geizhals.at/a330503.html)
Click to expand...
Click to collapse
It was when I got mine. Looking at the (stock) pic, it still looks like a 6 in the top-right, no? I think the site has it wrongly labelled.
shame on sandisk for not giving perf figures on their website though.
there's a good site for SD (not microSD) & CF benchmarks here:
http://www.robgalbraith.com/bins/reader_report_multi_page.asp?cid=6007-9438
it's mostly for camera-types, but there is a USB reader section that should test the raw card. again, not for microSD, but gives an idea, perhaps.
I don't think using a class 6 card is that much faster (or even at all) than using a class 4 card. I can't see any difference in speed in the UI - only in load times.
cdmackay said:
It was when I got mine. Looking at the (stock) pic, it still looks like a 6 in the top-right, no? I think the site has it wrongly labelled.
shame on sandisk for not giving perf figures on their website though.
Click to expand...
Click to collapse
No, this is a site for price comparison - I've been at 2 shops and they both had the ultra card and it was class 4...
one shop had a class6, but on the package it said class 4. (and it was very expensive)
I think I'll go with the transcend
that's very odd...
Sandisk Ultra speed
Hi,
I got my Sandisk Mobile Ultra 8 GB SDHC card yesterday.
The web shop where I bought it said Class 6, but the print on the card says Class 4. I was obviously disappointed, but as I transferred my old data to the new card using the supplied (really handy) card reader, I achieved a constant transfer speed of about 13 MB/s.
The phone does seem a bit more responsive now, although that may only be psychological. It is definitely faster in Albums and Music, though.
Best regards,
Martin Wiboe
Changing the SD card
Hello Guys,
i am new to this forum, so i hope im posting in the right place
My hero came with a 2GB card, which i used now for a while.
Now i got a bigger card, to switch cards can i just copy everything from the old to the new bigger card and plug into the phone? Or do i need to reinstall something?
many thanks for your help
Arek
Format the new card in-phone first to ensure compatibility, then you can simply copy everything over from the old one.
many thx for that, will try it soon
Arek
Today I got my Transcend Class6 microSDHC card.
Results (with SiSoft Sandra & Card formatted in Hero (original format was a bit faster)):
Transcend 8GB Class 6:
512bytes
Read : 226.22kB/s
Write : 22.82kB/s
32kB
Read : 7.19MB/s
Write : 1.02MB/s
2MB Dateitest
Read : 14.67MB/s
Write : 6.70MB/s
64MB
Read : 14.93MB/s
Write : 8.53MB/s
256MB
Read : 17.07MB/s
Write : 8.53MB/s
Sandisk 2GB that comes with the phone:
512bytes
Read : 181.49kB/s
Write : 7.71kB/s
32kB
Read : 6.29MB/s
Write : 882.67kB/s
256kB
Read : 9.00MB/s, 61.47X
Write : 3.09MB/s
2MB
Read : 10.10MB/s
Write : 3.70MB/s
64MB
Read : 10.67MB/s
Write : 5.33MB/s
256MB
Read : 8.53MB/s
Write : 4.27MB/s
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.
Click to expand...
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.
Click to expand...
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.
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?
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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.
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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.
I found this on amazon, pretty much the cheapest and highest i can find on the class category, right now i have a 8GB Class 6 but im running out of space because of the HD videos im recording, will i noticed any significant difference in performance on this phone? and its Kingston and trust them
http://www.amazon.com/Professional-...2?ie=UTF8&s=electronics&qid=1292972644&sr=1-2
anyone got feedback??
I had a 8GB class 2 and the phone needed alone around 3 seconds till the screen went balck and the cam started after pressing the camera key and 1 or 2 seconds till the cam was on.
Now I have a 16GB class 4 and the cam starts immediately (around 0,5 sec after pressing the camera key) and needs around 1-2 seconds till the cam is started.
I think Mediascape etc is also faster with the class 4 than with the class 2.
I don't want to have a class 2 card in my phone anymore, the whole phone feels faster with an class 4 card.
So I'd say you'll feel a difference. If you have the money, go for a 16GB class 4.
it comes with a 16gb class 2
get a class 4 or higher.
preferably a class 6
I read that the phone can't use the performance plus of a class 6 card compared to a class 4 one, so a class 4 should be the best choice.
I'm using 16G class 10 that i bought from Amazon
it work with my X10 and never had any problem until today.
effect: Camera and music are faster then the 8gb c4.
forgot to post the name of my 16gb c10 micro sd brand: kingmax
Good, bought the same card yesterday, hopefully it will he shipped fast. Changed from a 16gb class4 to class10 because with the latest firmware the X10 can read & write with class10 speed...
I'm actually upgrading from a Class2 2GB to a Class 6 8GB, hoping the system overall runs faster so I cant vouch for class2/6 change yet, although I'd question the "cheapest one" for class 2 I found this
remove the space between the "w" since i cant post links yet
ww w.amazon.com/SanDisk-microSDHC-Memory-SDSDQ-016G-Packaging/dp/B001L1H0SC/ref=sr_1_88?s=electronics&ie=UTF8&qid=1300394566&sr=1-88
Did you guys try getting readings on SD Tools for read/write?
On the original SD Class 2 I got write 1.6mb/s and read 60 mb/s (WTF?)
and on a class 10 which I bought off ebay I got 13mb/s and 17 mb/s !
Sorry if I'm not relevant but how do I find on which class my card is on ?
Sent from my X10i using XDA App
Use the app "SD Card Speed Test", it will show you the class.
Sent from my X10i using XDA Premium App
The best possible card is the Lexar microSDHC 32Gb Class 10, but it comes with a price of ~100Euro.
For 16Gb, check if you can find a Class 10 from Lexar, Kingston, Sandisk as these are reputable producers.
Or if the price is right, you can check out a Class 6 or Class 10 made by TeamGroup or A-Data, these are 2nd tier producers.
In the end, remember that not always the fact that is written on the package makes it true.
Darth Glacious said:
The best possible card is the Lexar microSDHC 32Gb Class 10, but it comes with a price of ~100Euro.
For 16Gb, check if you can find a Class 10 from Lexar, Kingston, Sandisk as these are reputable producers.
Or if the price is right, you can check out a Class 6 or Class 10 made by TeamGroup or A-Data, these are 2nd tier producers.
In the end, remember that not always the fact that is written on the package makes it true.
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I use this card and "bang for buck" its the best out there. Never had a problem and read/writes are exactly as stated. In fact, after installing a custom rom, changing to .58 baseband and then adding this card, its made me fall in love with this phone for the first time since I bought it and iv'e had mine since launch (UK). Excellent sdhc card, well worth the money, if like me, you use your phone as an entertainment device.
Class 6 Plus Camera Mod
A while back I stumbled on a camera mod for Build.Prop.. if you get a faster card.. you can adjust your FPS of cam.. I bought an 8Gb class 6 and with the mod it works quite well. So there is ways to improve your software if you want to upgrade your storage.. I got mine at Target with a reader for $20.00. Sure beats the stock 2Gb class 2
http://forum.xda-developers.com/showthread.php?t=922657
Class 10
I'm in the business of looking for one myself as well. From what i have been told your best bet is a class 6 and up. I am looking for a class 10 myself just because the read and right speed are the fastest. Taking pictures, recording video, etc.. always try with class 6 and up for sure.
I have a Sandisk 16GB Class 4 card and just tested the speed:
write: 5.5 mbps
read: 10.9 mbps
Never had any problems with video recording but I can imagine the difference between this one and a class 6 is noticable.
Hi all!
What class of sd cards is the best for NT? Is it necessary to bay class 10 sd card?
I'm using a Sandisk Class 4 16gig card and it works fine. Absolutely no problems. Haven't tried a class 10 so I can't reliably say whether it would be better or not.
class speed doesn't matter much when it comes to using it with the NT. the reason is because the class speed just represents the write speed, whereas when you use your sdcard in the NT, the only thing that matters is read speed. So I would say a class 10 card isn't worth the money. I would go for like a class 4 or class 6 16gb card. I find that to be the sweet spot. hope that helps
i am using a 16gig hc class 4, show it in a video
I asked that question because i want to bay new sd card for my Nook, but i don't know if nook's controller allow me to use my card in full speed.
I am getting a 32gb Class 10 card (Lexar) that I paid 40 dollars for. I will let you know how it performs once I receive/install.
I downloaded SDFormatter and if anyone has suggestions on formatting or partitioning, let me know. I heard FAT32 but that is all I know.
I'm using an AmazonBasics class 10 32Gb card that I already had in my camera and it works great. I'll probably buy another just like it to put back in the camera.
i've bought a new silicon power's class 10 sd card. SD tools test showed me 15.9 write speed and 18.2 read speed.
Someplace here on forum I have read the best is to get a ScanDisk class 2 or 4 to work with the NT. Perhaps you could do a search on ScanDisk and find the exact post. BTW because of that recommendation that is what I use with my NT and so far so good that is working out great for me.
Manual suggests Class 6. Where did you find the 32 gig for $40?