[Question] Class 10 Speed - XPERIA X10 Q&A, Help & Troubleshooting

Hi, I've recently purchased a class 10 16 gb sdhc card for my phone on ebay. I got 15MB/s write and 15MB/s read using the SD Card Speed Test application and i got 2MB/s write and 10MB/s read using my stock Class 2 8 gb sdhc card. Now I need to leave feedback and could anyone from this forum please tell me if this is a good speed for a class 10 card or did i get ripped off?

Eryklok said:
Hi, I've recently purchased a class 10 16 gb sdhc card for my phone on ebay. I got 15MB/s write and 15MB/s read using the SD Card Speed Test application and i got 2MB/s write and 10MB/s read using my stock Class 2 8 gb sdhc card. Now I need to leave feedback and could anyone from this forum please tell me if this is a good speed for a class 10 card or did i get ripped off?
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Yeah you got ripped off because class 10 should give you 30mb/s read write
/sarcasm mode
Sent from my SAMSUNG-SGH-I897 using Tapatalk

LOL
Thats the speed of Class 10 dude !
you got what you paid for
but you can get better result by modifying buffers

you mean use a script to change the reading speed? yeah i know. and thanks for the replies guys i was just making sure no need to make fun of the noob greenstuffs :/

yep, thats what i mean,
it will speed up, read and write both ways !

Your write speed is really good, got 15MB/s, too with my Kingmax 16GB c10, but only once.
To improve your read speed you should install the app "SD increase", then you should get 25-30MB/s read or even more. My Kingmax is cheap (32€) because of that I "only" get 25-30MB/s read using the SD increase app.
When I changed the cache myself I got 40MB/s read, but after a reboot the changes are gone so I prefer the SD increase app.
@ zmbutt:
I think his write speeds won't increase (much), 15MB/s are already really high and not really affected by the buffer size.

it made no change at all :/ i got mine for $35 AUD lol

Related

[q] sd card class

i have 2 gb sd card that came along with the phone. i presume its a class 2 card. however i get write speed of 9.6 mbps and a read speed of 12 mbps...what should b the class of this one...what i saw on the internet is that class 2 , 4 and 6 have write speed od 2,4 and 6 mbps respectively...is that correct??
akki1791 said:
i have 2 gb sd card that came along with the phone. i presume its a class 2 card. however i get write speed of 9.6 mbps and a read speed of 12 mbps...what should b the class of this one...what i saw on the internet is that class 2 , 4 and 6 have write speed od 2,4 and 6 mbps respectively...is that correct??
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why do you need this? if you have unmount issues, just buy a new one.. i bought a really cheap 8GB one in Indonesia (pure win for 10 USD) and it works perfectly (except i have organization issues now)
Class rating is just the minimum spec. Consider yourself very lucky to have one that exceeds the spec so much.
wally509 said:
Class rating is just the minimum spec. Consider yourself very lucky to have one that exceeds the spec so much.
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i just needed to know as a few roms need higher class sd to flash them...so i asked..?? if u could tell...
akki1791 said:
i just needed to know as a few roms need higher class sd to flash them...so i asked..?? if u could tell...
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Pardon me, but I don't understand. Is this a question or a comment?
By the way, capitalization makes a difference.
9Mbps would be slower than class 2.
9MBps would be faster than class 6.

[Q] SDHC class for 720p reading

I'm confused on the Class rating for SD cards. I understand it to be a write-speed rating, and in my usage I'm more concerned with read throughput. My goal is to watch 480p and 720p content without jitters, and I'm not sure if the higher class matters or not for reads.
Thanks!
The write speed is going to be the same as the read speed. With flash memory fragmentation doesn't effect read speed much because of the low access time. With writing the card has to find an empty cell and write which could effect the writing performance. The class signifies that under heavy fragmentation the card should write at the speed of the class (i.e. class 10 should be 10 Mb/s). Also, regardless of fragmentation the card should read at the speed of the class. So in your case if your not needing high speed write then a class 2 or 4 should be fine. I personally wouldn't go below 4 because you never know if you might need the extra speed later.
Looking at Wikipedia the class is both Read & Write.
I personally use class 4 16GB cards and they seem to do the job fine on the re-encoded 1080/720 content I have on them.
I have a Class 10 Patriot Micro SDHC card and it works fine. I also tested with a Patriot SDHC (full size) in the sock and works fine. Both tested with 720p H264 MOV.
Heh I would be worried if a class 10 (being the fastest you can get) was having issues
Sent from my Transformer TF101 using Tapatalk
a class 10 is perfect for anything and ull only spend another maybe 10then a class 4. i only get class 10s or higher for my phones and cameras just in case i need the extra power
Sent from my PC36100 using Tapatalk
Full size SD's are pretty similar in price between classes but microSD's are insanely different... £17 for a class4 16GB or £40 for class10
alex5790 said:
The write speed is going to be the same as the read speed. With flash memory fragmentation doesn't effect read speed much because of the low access time. With writing the card has to find an empty cell and write which could effect the writing performance. The class signifies that under heavy fragmentation the card should write at the speed of the class (i.e. class 10 should be 10 Mb/s). Also, regardless of fragmentation the card should read at the speed of the class. So in your case if your not needing high speed write then a class 2 or 4 should be fine. I personally wouldn't go below 4 because you never know if you might need the extra speed later.
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No. The class is the garunteed write speed, the read speed has no relation and can vary from card to card. I am using one of two cards in my tab, one a class 4 and the other a class 2 and neither have ever come close to having an issue streaming. The class 4 can read at over 16mb/s, Ive tested it.
The only reason to pay for a C6 or higher card is because you need to push data to it quickly., like recording video.
ryan stewart said:
No. The class is the garunteed write speed, the read speed has no relation and can vary from card to card. I am using one of two cards in my tab, one a class 4 and the other a class 2 and neither have ever come close to having an issue streaming. The class 4 can read at over 16mb/s, Ive tested it.
The only reason to pay for a C6 or higher card is because you need to push data to it quickly., like recording video.
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+1. This is the correct answer. Good cards typically read much faster than the write speed.
Read speed is not correlated to the write speed or class rating at all...and in most cases, it's way higher than the write speed...
so theoretically even a class 1 card (if you can find one) is able to stream 720P content without much issues..but it will take forever to copy the content onto the card.
my class 10 card reads over 30MB/s and my class 4 does around 16MB/s
What card do you have? I was looking into getting one.

Using CrystalDiskMark to determine speed of SD card

hey all, i was just wondering if anyone knows the differences between the tests that crystaldiskmark does to test the speed of a storage device.
there are 4 different tests: sequential, 512k, 4k, and 4kQD32. read and write tests for each type of test.
thanks!
EDIT: heres a screenshot of my results:
I can't tell you about all of them, but sequential writes are what your card class is all about. A class X card is supposed to write a minimum of X MB/s. Your class 6 is writing well above its rating, congrats.
The other I can mention is 4kQD32 writes -- according to the Nook Color folks, it's very helpful for performance of SD installs of Android, so if we ever get an sd install here, hold on to that card. Higher class cards, 6 and 10, often do horrible in that 4k writes category. Class 2 and 4 Sandisks seem to have the best track record, but your transcend isn't half bad, and my best 4k writer is a no name card that outperforms my other 2 sandisks and a samsung. Source.
fortunz said:
I can't tell you about all of them, but sequential writes are what your card class is all about. A class X card is supposed to write a minimum of X MB/s. Your class 6 is writing well above its rating, congrats.
The other I can mention is 4kQD32 writes -- according to the Nook Color folks, it's very helpful for performance of SD installs of Android, so if we ever get an sd install here, hold on to that card. Higher class cards, 6 and 10, often do horrible in that 4k writes category. Class 2 and 4 Sandisks seem to have the best track record, but your transcend isn't half bad, and my best 4k writer is a no name card that outperforms my other 2 sandisks and a samsung. Source.
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All right thanks. Its weird though I was just trying to copy a huge amount of files to my sd card (about 6.5 gb) and it was writing at like 3 mb's per second. Does the size of the transfer affect the write speed since this test was only using a 50 mb file?
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Copying lots of little files, in my experience, goes slower than copying a single large file. When I copy a video onto my card, I get close to the max speed. When I copy directories full of files, anything goes.
fortunz said:
Copying lots of little files, in my experience, goes slower than copying a single large file. When I copy a video onto my card, I get close to the max speed. When I copy directories full of files, anything goes.
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Ok well I guess this sd card isn't all too bad then... really wanting to get a 32 gb card but trying to wait until I can get a better deal for it... you think a sandisk class 4 32 gb is good enough for games and videos?? I haven't seen any class 6 32 gb cards anywhere... not even sure if they exist...
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ShinnAsuka said:
you think a sandisk class 4 32 gb is good enough for games and videos??
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I have a SanDisk Class 4 32 gb card for my Nook Tablet and it seems to work fine for games like GTA3, Angry Birds, etc. as well as .avi movies.
I tend to agree with Nookie. Depending on its actual performance (sandisks often outperform their minimum write rating, but not always), it might be frustrating to copy the files over, but viewing videos and playing games will work just fine even on a class 2. Fast sequential read speeds are easy to come by, and frankly they don't have to be all that fast to view even HD video. Your games are going to load into ram and play from there and perform just fine.

What Class MicroSD card to go for (Gaming and lots of apps in Mind)

Hey Guys
Am looking for a suitable Microsd Class rating ( am going for Sandisk, 16 GB or 8GB) for my Motorola Photon. I am going to install a lot of games, specially those Tegra 2 ones, Max Payne and others too, and alot of apps on the phone.And i might use Link2SD to move them to the SD card to keep Phone memory less occupied.
So as to what i feel is that i'd be requiring good read/write speeds for games, plus proper loading of apps (in time, i don't want lags at all). the problem is, according to the Price, i can go for 8GB class 6 or 16GB class 4. What do u guys think i should go for? would it really matter? i know class ratings are the Writing Speeds, but who knows?
Regards
Save up for a Class 10. There is a world of difference between a class 4 and a class 10 especially when using ROMs that have the SDSpeed tweaks.
I like class 4 personally as write speed really only affects installing imho. lower write cards tend to have higher read as well. SanDisk as a brand makes Damn fine cards which I think brand makes more difference than class overall.
Sent from my mopho
@Loki,
What about a Sandisk 8 or 16GB Ultra at UHS 1 speed?
i read the following on Wikipedia about UHS Cards
"Cards that comply with UHS show UHS-I or UHS-II on the label, and report this capability to the host device. Use of UHS requires that the host device command the card to drop from 3.3-volt to 1.8-volt operation and select the 4-bit transfer mode".
Is above compliant with Motorola Photon? I cant seem to find a Sandisk card with a Class 10 rating else than this one.
@Cornelius,
i think that when playing a game, the Phone might want to Read/Write data during play times even.Reading happens all the time, but Writing would also take place. But as Loki said, i'd be interested in trying these ROMs with SDSpeed tweaks. i really want no lags at all...
Regards
it really depends on the game, but writes happen way less than reads in most cases. class 10 is more for pictures and videos in my humble opinion. most games were it matters, it's a 400+ mb 1 Time download and then massive reads.
Sent from my mopho
@Cornelius
What about apps? they would also be fine with Class 4? i use a Sandisk 16GB class 4 in my Sansa Fuze all the time, and never had a problem with it, but i dont want my phone to lag at all. Apps might need to Read and Write in real time right??
Regards
if finances are an issue, than here is a G Skill brand 32gb class 6 for $15 shipped.
http://www.newegg.com/Product/Produ...ction-_-cables-_-na-_-na&Item=N82E16820231603
usually in 99.99% of cases read is more important than write. usually writes are so small they don't matter.
Sent from my mopho
Lexar 32GB Class 10 $26
I'm averaging 11MB Write and 21MB Read on Imperium Initiatve
high write or high read its always a compromise. if your that worried about hints of lag use the smallest sdcard you can get by with.
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@Lokifish Marz
One suggestion was Class 10 microSD, and when paired up with ROMs that have SDSpeed tweaks, where does the difference lie (imagining u have experiences with class 10 and SDSpeed tweaks)? What is better than when a class 4 is used?
Plus what tool do u use to get the Read/Write speeds? i suppose its on ur phone only? Also i am thinking of pulling the trigger on an 8GB Class 10 Sandisk. I live in India and Amazon is not an option.....only ebay.in is....
@Cornelius, i agree with what u say about reading going on way more than writing, but then what about SSDs in computers? the performance boost is just because of the Increase in read speeds and not write? I know it gets pretty complex in computers, swap and pagefiles, etc, but faster HDDs mean faster computers, and even though writing happens lesser than reading on the phones, but some writing must be happening that bottlenecks the speed of the phone. am i Right? just trying to learn here from u guys.
Regards
no I'm saying a class 4 usually has a higher read speed than a class 10 but yes the big boost from ssd hdd is the read in 99% of cases.
Sent from my mopho
psgarcha92 said:
@Lokifish Marz
One suggestion was Class 10 microSD, and when paired up with ROMs that have SDSpeed tweaks, where does the difference lie (imagining u have experiences with class 10 and SDSpeed tweaks)? What is better than when a class 4 is used?
Plus what tool do u use to get the Read/Write speeds? i suppose its on ur phone only? Also i am thinking of pulling the trigger on an 8GB Class 10 Sandisk. I live in India and Amazon is not an option.....only ebay.in is....
@Cornelius, i agree with what u say about reading going on way more than writing, but then what about SSDs in computers? the performance boost is just because of the Increase in read speeds and not write? I know it gets pretty complex in computers, swap and pagefiles, etc, but faster HDDs mean faster computers, and even though writing happens lesser than reading on the phones, but some writing must be happening that bottlenecks the speed of the phone. am i Right? just trying to learn here from u guys.
Regards
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I am not sure what class 4 Cornelius is using. I don't have one but do have a class 6 Lexar from the same family as my class 10. On Imperium, the class 6 was slower than the class 10 in every aspect:
Lexar 8GB
class 6
Write- 5.8MB/s
Read- 18.8MB/s
The SDpeed tweaks, when set up correctly, improve read speeds across the board. It does tend to max out at a read speed of 20-25MB/s on Imperium. Further tuning may improve this but haven't had the time. I haven't tried any of the UHS cards yet. The big drawback with lower class cards is going to be your write speeds, the falloff on write speeds is there but not as much.
I'm not saying that Cornelius is wrong, just in my personal experience with flash storage has been different. Having used flash storage as everything from regular use to building flash storage based workstations, the lower class rating has a noticeable impact on write speeds but not so noticeable impact on read speeds on a tuned setup.
I only use SanDisk cards, used to go Kingston but they kinda fell out a while back.
Sent from my mopho
I'm using the newer Samsung cards and they make quality memory as well. As cheap as a class 10 card can be had why not go for that over a lower class card?

SD card - are R/W speeds really so bad?

Hi,
I'm considering a purchase or Xperia X, but in one review (notebookcheck.net) they found very poor read/write speeds of external microSD card (only 17MB/s read and 13MB/s write - both are sequential). Have you tested it and are the speeds really so horrible? Thx.
it depends on the quality of your actual SD card being used. Currently using the Samsung Evo+ 64GB SD and I get over 50MB/s speed.
Thank you for your reaction. 50MB/s in Xperia X sounds promising . In the review (notebookcheck.net) they used Toshiba Exceria Pro M401 (very good SD card - R90/W80). Maybe compatibility problem between Xperia X and Toshiba Exceria. And your 50MB/s is read or write, or both?
robocopvn said:
it depends on the quality of your actual SD card being used. Currently using the Samsung Evo+ 64GB SD and I get over 50MB/s speed.
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With the same SD I get 30 mb/S read and 20 write. Empty and freshly formatted
Sent from my F5121 using XDA-Developers Legacy app
Thank you, Invicta. Your speeds are not spectacular, but I think they are sufficient.
write speeds are ok, read on the other hand is on the low side i think.
So finally I bought Xperia X and here is my experience: Sandisk Extreme 64 GB - R/W 30/30 MB/s. Speed is not the best but sufficient for me. I also tested Samsung Evo+ 32 GB, speed is lower than Sandisk. (27R/20W).
Invicta said:
With the same SD I get 30 mb/S read and 20 write. Empty and freshly formatted
Sent from my F5121 using XDA-Developers Legacy app
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I get ~50MB/s read and ~30MB/s write. Don't know if it is in the variable range of the product but 20MB/s difference over 50MB/s is alot

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