So, most of you probably noticed you have to have the Camera set to INTERNAL STORAGE in order for it to be even possible to shoot HD video as the external CLASS 4 SDHC card is incapable of writing fast enough. After searching all over the web I'm hearing about some successful upgrades to class 6 and even class 10 sdhc cards to fix this issue with mixed long-term results.
One of the issues I see popping up a lot with the class 10 cards is data corruption. Sometimes the data can be recovered with chkdsk, sometimes the card needs to be outright formatted to be useable again and all data is lost.
Does anyone know what causes that?
Is the Droid X2 even capable of taking advantage of the Class 10s speeds or is there an innate bottleneck that gives it speeds comparable to a good class 6?
Are certain cards performing better in the Motorola phones, such as this one?
I'm really interested in a 32GB card because the damn thing fills up quick when you shoot video, but I really don't want any headaches considering the cost of these things.
Has anyone with a Droid X2 upgraded to a 32GB Class 6 or 10 without any problems? Can you post benchmarks that show that the card is capable of writing at 10mb/s or faster?
I'll update this OP with any helpful feedback if it comes to that.
Please don't link me to any of the half of dozen other SDHC threads as it doesn't answer my question regarding the application, compatibility, and potential bottlenecks of Class 6 and 10 cards in a Motorola Droid X2.
I had a class 10 card, it gave me tons of errors. Sometimes just by plugging it directly into the computer would fix it. Twice that did not work and I needed a complete reformat.
I had my class 10 SD card in my Droid X2 for about 2 weeks before I needed a reformatting. But I'm a tech disaster zone, I think I ate a powerful magnet as a kid. But either way keep that number in mind. I got a quick replacement at walmart that didn't list the class, but it is working well now.
Oh and it was a 16gb card
Could you benchmark its write speed? If it's able to record 720 video without stuttering, all I need to know is how fast it's capable of writing data. Class 4s are apparently too slow, so it's probably a class 6.
ryoxsinfar said:
I had a class 10 card, it gave me tons of errors. Sometimes just by plugging it directly into the computer would fix it. Twice that did not work and I needed a complete reformat.
I had my class 10 SD card in my Droid X2 for about 2 weeks before I needed a reformatting. But I'm a tech disaster zone, I think I ate a powerful magnet as a kid. But either way keep that number in mind. I got a quick replacement at walmart that didn't list the class, but it is working well now.
Oh and it was a 16gb card
Click to expand...
Click to collapse
Sent from my DROID X² using the XDA Premium App
My TOPRAM 8GB class 10 works wonderfully, I haven't had a single issue.
Here's what I did. Removed old sdcard, installed new sdcard, powdered on phone, navigated to settings> sdcard & phone storage> unmount sdcard | format sdcard | mount sdcard.
Zero errors, it's been weeks since installation. Benchmarks 8.8MB read 13.7MB write.
Sent from my DROID X2
Awesome! This is the kinda feedback I'm looking for! Thanks, sweetheart.
juhde said:
My TOPRAM 8GB class 10 works wonderfully, I haven't had a single issue.
Here's what I did. Removed old sdcard, installed new sdcard, powdered on phone, navigated to settings> sdcard & phone storage> unmount sdcard | format sdcard | mount sdcard.
Zero errors, it's been weeks since installation. Benchmarks 8.8MB read 13.7MB write.
Sent from my DROID X2
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Click to collapse
i've got a 2yr old Kingston Class 6 8GB card that handles 720P video on this thing just fine. almost went for a class 10 but didn't feel the expense at the time was worth the minor speed boost. The handful of videos i still have are from a concert and going by size and length its writing around 1.5mb/s on average for mine. was a techno show, low light and lots of moving flashy lights.
Class 4's should be fine... but again i've rarely hit full speed with sd cards.
The Class 4 that it comes with isn't able to handle the HD video recording. View the resources section at the bottom of this post. There's also a youtube link to what kind of videos people are getting with class 4 SDHCs at the bottom of that list.
Could you bench your class 6 and post the results?
Here are two free apps that can do this easily for you:
An Tu Tu Benchmark
SD Tools
Thanks
SD Tools doesn't work on my X2 it says "Error reading buffer..."
I've tried to reinstall it as well with no luck. Anyone else having the same problem?
I just ran a test with AnTuTu, only I just realized there is only one spot for SD card speed. Did it just test my internal only? I also tried SD tools but it says "Read Buffer Error".
If it did test my external card then the Write was 5.2MB/s and Read was 8.2 MB/s. This card came from walmart, capacity 16gb, it was just what they had.
Ugh, stupid double post. Where's the dang post delete button? LOL
ryoxsinfar said:
I just ran a test with AnTuTu, only I just realized there is only one spot for SD card speed. Did it just test my internal only? I also tried SD tools but it says "Read Buffer Error".
If it did test my external card then the Write was 5.2MB/s and Read was 8.2 MB/s. This card came from walmart, capacity 16gb, it was just what they had.
Click to expand...
Click to collapse
Oh wow antutu only benchmarks the internal. Personally, I benched mine from my PC. I didn't try the android apps myself. I just assumed they worked. Does anyone know a benchmarking app that works for the Droid X2 External SD CARD? I use ATTO from my PC. I get consistent 4.2 MB/s on the external but on the internal I cap at around 5.4. This leads me to believe that a class 6 card is more than sufficient, but I'm really interested in investing into a class 10 for the long term.
I haven't heard of anyone having problems with class 6s, so that seems to be a safe bet.
Anyone else out there with class 10s on their DX2 wanna post some feedback?
Edit: Benching program SD Card Speed Test. I have run the tests w/ a class 6 but I forgot where I placed the text files, but ican say there is a pretty decent difference.
Edit 2: 16 GB PNY
RAN WITH A CLASS 10 SD CARD
5 runs w/o SD speed increase (128kb)
Trial #1 - Write speed - 10 MB/s Reading speed - 14 MB/s
Trial #2 - Write speed - 10 MB/s Reading speed - 9 MB/s
Trial #3 - Write speed - 7MB/s Reading speed 9 MB/s
Trial # 4 - Write speed 9 MB/s Reading speed 18 MB/s
Trial # 5 - Write speed 8 MB/s Reading speed 12 MB/s
Average : Write speed - 8.8 MB/s Reading speed - 12.4 MB/s (stock)
5 runs w/ SD speed increase (1024)
Trial #1 - Write speed 8 MB/s Reading speed 14 MB/s
Trial #2 - Write speed 10 MB/s Reading speed 11 MB/s
Trial #3 - Write speed 10 MB/s Reading speed 11 MB/s
Trial #4 - Write speed 7 MB/s Reading speed 8 MB/s
Trial # 5 - Write speed 5 MB/s Reading speed 11 MB/s
Average: Write speed - 8 MB/s Reading speed - 11 MB/s ( - .8 write speed (10% loss) - 1.4 reading speed (11.6% loss) from stock)
5 runs w/ SD speed increase (2048)
Trial # 1 - Write speed 11 MB/s Reading speed 22 MB/s
Trial # 2 - Write speed 15 MB/s Reading speed 25 MB/s
Trial # 3 - Write speed 12 MB/s Reading speeed 22 MB/s
Trial # 4 - Write speed 15 Mb/s Reading speed is 14 MB/s
Trial # 5 - Write speed 12 MB/s Reading speed is 25 MB/s
Average: Write speed - 13 MB/s Reading speed - 21.6 MB/s ( + 4.2 write speed (47% gain) + 9.2 reading speed (74% gain) from stock)
5 runs w/ SD speed increase (3072)
Trial # 1 - Write speed 10 MB/s Reading speed 22 MB/s
Trial # 2 - Write speed 14 MB/s Reading speed 16 MB/s
Trial # 3 - Write speed 14 MB/s Reading speed 14 MB/s
Trial # 4 - Write speed 8 MB/s Reading speed 22 MB/s
Trial # 5 - Write speed 13 MB/s Reading speed 22MB/s
Average: Write speed - 11.8 MB/s Reading speed - 19.2 MB/s ( + 3 write speed (34% gain) + 6.8 reading speed (54% gain) from stock)
5 runs w/ SD speed increase (4096)
Trial # 1 - Write speed 16 MB/s Reading speed 14 MB/s
Trial # 2 - Write speed 9 MB/s Reading speed 22 MB/s
Trial # 3 - Write speed 13 MB/s Reading speed 22 MB/s
Trial # 4 - Write speed 11 MB/s Reading speed 22 MB/s
Trial # 5 - Write speed 10 MB/s Reading speed 22 MB/s
Average: Write speed - 11.8 MB/s Reading speed - 20.4 MB/s ( + 3 write speed (34% gain) + 8 reading speed (64% gain) from stock)
Very nice. And you haven't had any issues with that card such as data corruptions with your Droid X²?
Sent from my DROID X² using the XDA Premium App
Calcobrena said:
Very nice. And you haven't had any issues with that card such as data corruptions with your Droid X²?
Sent from my DROID X² using the XDA Premium App
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Click to collapse
Zero, and I've had this card for at least 2-3 weeks now. One thing I can say though is the portioning seems to slow it down significantly, not sure if it frees up much RAM doing it anyways with most of the apps going to the SD instead of the internal flash. But w/o bloat removal and the V6 supercharger I had 180 MB of RAM free at one time. I've pushed the old vold.fstab back, and I'll check out the differences in speed once again, along with total free memory.
Awesome. I'm gonna go ahead and list this as a known compatible. Let me know if any issues crop up, please.
Sent from my DROID X² using the XDA Premium App
I can see where hidef video recording would be important to have a fast sd card, but some are assuming the sd card is the issue for audio pops on the DX2. The problem with that theory is that MP3s cache a chunk or (depending on size) all of the file to memory and there are parity checks for audio continuity. MP3s do not stream from the card, per say. Even cheap CD players buffer at least a few hundred KB with cache and more for better players (to cover for driving environment).
I thought my SD card was causing my Mp3 files to stutter but after moving them over to internal memory it only helped a bit and stuttering continues.
This thing is a pos =p
I also can not find an app called "sd card speed test"... which one are you using zetsumeikuro?
Calcobrena said:
Ugh, stupid double post. Where's the dang post delete button? LOL
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I've got a 16GB Patriot Memory Class 10 that I have been using for almost a year now with no issues. Although it is in my Samsung Vibrant (Custom ROM / VooDoo). I upgraded from a class 4 and did notice quite a difference in access time.
PnoT said:
I thought my SD card was causing my Mp3 files to stutter but after moving them over to internal memory it only helped a bit and stuttering continues.
This thing is a pos =p
I also can not find an app called "sd card speed test"... which one are you using zetsumeikuro?
Click to expand...
Click to collapse
Never had any of the stuttering issues w/ mp3 etc. If you think the phone is a PoS get rid of it .
Thanks blaq, but unfortunately that doesn't help much because motorola devices are supposedly fussy with some class 10 cards causing file system and corruptions and whatnot that other manufacturers' devices aren't experiencing.
As for music I have been using google music without any skipping issues and it's also freed up a few gigs on my SD card.
Sent from my DROID X² using the XDA Premium App
Related
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?
Click to expand...
Click to collapse
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
A friend of mine just bought a Galaxy SII and wants to know if it's worth getting a class 10 card. Can the phone write to the SD at that speed. What is the maximum speed the phone can write to the card at?
The question is what you are planning to do with your phone to make use of such a high speed.
Class 4 means a writing-speed of at least 4MB/s. Even ignoring the fact that most cards can write significant faster in reality than their Class indicates, there is nothing you can really do with a phone to use this speed.
The fastest writing-speed you will need is when recording movies, and the highest bitrate the default camera uses is 17MBit/s.
With a Class 4 card you can record at least 32MBit/s.
Of course you can transfer your media faster on your card, if the writing-speed is higher, but how important is that?
It is a good point put forward by the poster above.
I have a class 10 card and it only comes in handy when transferring files to and from the card. Transfer speed is about 14MB/s with a patriot clss 10 16 GB from my experience so appears to be limited by the speed of the card. And writing is over 10MB/s which the class 10 part defines.
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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Click to collapse
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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Click to collapse
+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.
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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Click to collapse
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?
Sent from my Nook Tablet using XDA PREMIUM
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.
Click to expand...
Click to collapse
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...
Sent from my Nook Tablet using XDA PREMIUM
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.
hi ive got a genuine 32gb samsung class 10 micro sd that i ordered from play.com im doing some speed test and im only getting 13mb read and 11mb write speeds would it be because im using a old sd card reader?
thanks in advance
exfat as you can transfer files above 4gb if you are going to watch 720p movies or even 1080p movies. fat32 restricts you to only 4gb files. so yh exfat all the way. i think the siyah kernel can read ntfs, im not too sure. But yh exfat is the way to go.
Are you talking Mb (Megabit) or MB (Megabyte, 1MB = 8 Mb)
(The first letter is always in upper, since a lower-case m means milli which equals 0.001 instead of Mega which equals 1'000'000)
I'd guess MB: Class-10 cards have a minimum Write speed of 10 MB/s so you're still in the boundaries.
Also note that a card that has once been filled already is slower than a "virgin" card.
But of course old SD-card readers can make a difference.