Hi I was wondering if owners of the Sandisk 8gb Ultra Micro SDHC could benchmark the drive using: http://www.techpowerup.com/downloads/1137/ATTO_Disk_Benchmark_v2.34.html
Please could you put transfer size from 2 - 8192 and total length to 256mb . Also make sure you choose the right drive letter then press start. I just wanted to know how quick it is at transferring small chunks and large chunks of data. Once its done (should take about 10-20 minutes) , please could you save it as a bmk file and upload it on to here as an attachment or take a screenshot and post here.
Thanks in advance to whoever can do this. I will be very grateful.
http://www.i4u.com/full-review-447.html
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First off, In advance, I GREATLY appreciate your time and efforts.
I had an AT&T Tilt with an 8gb microsd card formatted with a FAT32 file system, 512 byte sector size, a 4kb cluster size, and NO Backup Fat. For some reason with this formatting, I was unable to add very large files (over 100mb) to the card using activesync. The only way I was able to do this was to download the file from the internet, and to the phone/storage card.
Now, I just bought a brand new AT&T Tilt 2, and have an 8gb microsd card waiting for me at the post office. How should I format this new card so I can add large files (for TOM TOM 7).. Im assuming the problem im having falls with the "cluster size"?? Thanks very much for your help. Happy holidays.
I don't think WinMo will do NTFS anyways, so that's out of the question. Might be best to leave the formatting settings on default.
I usually use the disk drive mode to transfer files though, rather than activesync.
I'm thinking of getting a Transformer and dock, and want to use it to backup photos from a fast compact flash card (via a card reader) to an external 2.5 inch hard drive.
I'm pretty sure this will work, but wondered what sort of transfer speeds I would get. Using a computer I can get about 23 MBytes per second from a SanDisk Extreme IV card (about 1 photo a second ).
If it is quick enough, it will save me having to take a computer on holiday with me.
Could somebody (or lots of people) run a test or two and post up some results please ? A comparison with equivalent tests performed with a pc would also be useful to gauge relative performance.
Regards,
M
Can anyone help with this ?
Just a quick test to see how fast the transfers can go ?
Thanks in advance,
Matthew
i just thought about ROM's made to store memory on SD cards instead of being stored internaly. can anyone explain y it wouldnt work or y anyone hasnt done it yet?
also wanted to add, by doing this change of memory storage it would speed up the system by 50%. it would also be a + for people who play video games on their smart phones Zonia, Inotia, MMO's ect"""
An SD card, or any format of memory card for that matter, can only be used for the storage of data. It behaves like a hard disk. Data on it must be serially 'read' into a main memory buffer, before it can be accessed by your device's processor.
You can't replace 'real' memory with it or try to use it as real memory.
hijack562 said:
doing this change of memory storage it would speed up the system by 50%
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Click to collapse
why?
10 characters
so cant you partition a sd card to be used as real memory? or can it be possible to compress real memory?
and why you ask? cuz it would be nice to play games on a smart phone that only comes with 200mb or less memory. but has a fairy decent processor
Too Slow
The reason they don't do that is because SD cards are MUCH slower than memory. the fastest SD cards (Class 10) only transfer data at 10 MB/s. Memory on the other hand transfers data in the range of gigabytes per second. Even if the memory used a very "slow" rate of 1GB/s that is still 100x faster than a SD card is.
really?? a class 10 only reads 10mb per sec?? dam thats slow...but isnt a sd card consider a soild state drive or not?
Take a close look at an SD card. It only has 9 pins on it. In standard mode two of them aren't used, leaving 7. After 1 x Chip Select, 1 x Power, 2 x Ground, and 1 x Clock, that leaves two pins - namely 1 x Data In and 1 x Data Out.
Not a 32 bit data/address bus like an x86 or ARM processor, but a single, one bit wide bus.
A byte of stored data comes out of the Data Out line as 8 bits, one at a time.
Commands to the card, to ask it to retrieve/store the data you want, have to be sent down the Command/Data In line the same way. Data to be written to the card goes in down the same Data In line the same way, again one bit at a time.
Even though the clock rate can, in theory, be wound up to 25Mhz, it is still a tedious process to get data in and out of the thing.
True solid state drives use the SATA interface, a different type of interface, still serial as above, but the clock rates are much, much higher allowing 1.5 to 6.0 GBit/s transfer rates.
Memory cards can be considered solid state drives, just damned slow ones.
Sorry if this isn't directed towards OP but since we are talking about SD cards anyways I thought I'd ask. Any way to tell what class your SD card is? I have a 16GB one so I'm assuming its class 10.
New cards have the class number on the label, as Class n, or as a capital 'C' with the class number in it.
So I ordered a Samsung 64GB Class 10 micro SD card, and it seems VERY slow.
While I gone so much mind the slowness, as I dont play a lot of games and would use it more for pictures and music I was wondering if I could get a few questions answered before I send it back or just give it to someone else.
1: Does the S4 have problems with 64GB cards?
- I am running Sacs KitKat V2
2: should I format with a format (NSFT/exFat) and is it better done on a Mac or PC?
3: what should the Unit Size be?
4: I just copied my old sd card on to this one, and some of the big games I do have stopped showing up. but when I put my old card back in, they are there again.
Why would this happen?
Thanks for the help everyone!
You have to format the card using the phone itself. Go into settings then storage and the option should be there. Try that, then re-copy your stuff to the card. If you still have problem then it is probably a dud card.
Sent from my SAMSUNG-SGH-I717 using xda app-developers app
You shouldn't re-format it at all from stock, but if you do you should try the official SD Formatter: https://www.sdcard.org/downloads/formatter_4/
I have a samsung 64GB microsd in my S4 and it's ridiculously fast according to SD Tools (http://i.imgur.com/EXUVIP7.png), probably a caching causing that; but anyways, it's great in normal use copying roms over/etc.
Oishikatta said:
...probably a caching causing that
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LOL, you don't say! Divide those numbers by 10 and you have a more realistic speed indication :good:
Pfeffernuss said:
LOL, you don't say! Divide those numbers by 10 and you have a more realistic speed indication :good:
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Click to collapse
No, samsung does claim the card gets 70MB/s read and 20MB/s write - and the reviews on amazon match that even for the lower priced card:
http://www.amazon.com/Samsung-64GB-PLUS-Micro-Adapter/dp/B00I4ZMNY4/
Obviously the SD Tools benchmark isn't testing the actual card performance, but what matters is that in actual use the samsung cards are great.
Windows/crystaldiskmark can also easily be used to do a real test.
Here's in a usb 2.0 card reader:
Sequential Read : 23.455 MB/s
Sequential Write : 17.352 MB/s
Random Read 512KB : 22.898 MB/s
Random Write 512KB : 16.407 MB/s
Test : 100 MB [D: 32.1% (18.8/58.5 GB)] (x5)
Date : 2014/03/26 11:16:15
OS : Windows 8.1 [6.3 Build 9600] (x64)
If @chaos67731 isn't getting at minimum 10-20MB/s after formatting the card then there's probably something wrong with it.
chaos67731 said:
1: Does the S4 have problems with 64GB cards?
- I am running Sacs KitKat V2
2: should I format with a format (NSFT/exFat) and is it better done on a Mac or PC?
3: what should the Unit Size be?
4: I just copied my old sd card on to this one, and some of the big games I do have stopped showing up. but when I put my old card back in, they are there again.
Click to expand...
Click to collapse
1: A good amount of users (including me) had problems with their SD cards on S4s. The problems are between:
occasional unmount/remount (the system does this for no apparent reason). S4 cant read cards after a sudden unmount, and cards usually get killed. most of the cards reported are 16,32 and 64 GB micro SD kingstone. SandDisk has problems too but I'm not sure about Samsung's.
2: Just use the official SD formatter mentioned by @Oishikatta above.
3: if you used the official SD formatter you wont have to deal with Unit Size. (personally, I dont know what's that)
4: Do you use a card reader when you copy your memory card? or do you just connect the phone using a cable? try using a card reader when copying your SDs. Some hidden files may not appear if you used the cable.
I hope I helped and excuse my English, its not my native language.
Well if you have a SanDisk they want you to format exfat. http://kb.sandisk.com/app/answers/d...sion/L3RpbWUvMTM5NTg5ODI5OS9zaWQvRDdTTFVmUWw=
Oishikatta said:
No, samsung does claim the card gets 70MB/s read and 20MB/s write.
Click to expand...
Click to collapse
Sure, on a PC with an appropiate very fast SD-card reader. Using a phone you won't get those advertized speeds.
This is the result with a more proper SD-benchmarking app (although internal and external SD are shown in reverse):
These values will be more realistic. SD-Tools results (cached) don't mean jack, unfortunately.
I was wondering what write speeds you guys are getting to the Nvidia Shield Tablet.
I bought the Samsung Evo 64GB, and I'm getting around 7MB/s write from the computer to the microsd card.
A1 bench reports 10MB/s write, and on computer people are reporting around 13MB/s for this card.
I want to change cards, but first I want to confirm you guys are getting faster write speeds (15MB/s+) on your faster cards.
Method for testing:
1) Create a test file using cmd: fsutil file createnew 1GB.dat 1073741824
2) copy to phone microsd, time with stop watch: http://www.online-stopwatch.com/
3) 1024 / seconds to copy file = write speed in MB/s.
Would appreciate it if you guys can test your cards
just copied 1.1714gb to the internal mem of tablet in 85secs =13.78mb/sec
the very same file copied to a sandisk 64gb ultra microsd in the tablet took 164secs =7.14mb/sec