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Old Jun 5, 2010, 5:38 AM   #1
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Default Looking for a flash memory tester

Any suggestions for a free program that can test USB2 SDHC flash memory?

Would like to:
- Confirm total memory size.
- Test entire memory to verify all good.
- Report write and read speeds.

I'm running WinXP Pro on my desktop and Vista 64 bit on my laptop.
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Old Jun 5, 2010, 3:42 PM   #2
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Quote:
Originally Posted by skylark View Post
Any suggestions for a free program that can test USB2 SDHC flash memory?

Would like to:
- Confirm total memory size.
- Test entire memory to verify all good.
- Report write and read speeds.

I'm running WinXP Pro on my desktop and Vista 64 bit on my laptop.
I assume you mean a SDHC card in a USB2 card reader. The best
way to test capacity is to write to the card until it is full and then
read back the files to your computer. You can use a stopwatch
to measure transfer rate both ways. I get around 15-20MB/s using
a cheap multi-way card reader and a class 10 SDHC card. I don't
have any way of telling whether the speed bottleneck is the card
or the reader, but anyway, the transfer rate is reasonably close to
the speed claimed by the SDHC card manufacturer.

Your computer file system will probably report any read or
write errors. If you are really paranoid about file integrity, you
could checksum the files with MD5 or something similar.

The only really free software that comes to mind is Linux
or one of the BSDs, dd for the read/write tests and md5sum
for checking file integrity.
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Old Jun 5, 2010, 8:35 PM   #3
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You can use a free program called H2testw 1.4 to verify any flash cards or devices u may have ... it will do everything you are asking.
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Old Jun 6, 2010, 9:17 AM   #4
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Small app called Drivespeed will give you r/w speeds, but I don't recall if it checks for errors or not. Windows disc checker will do that on attached mass storage devices though.

brian
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Old Jun 12, 2010, 5:35 AM   #5
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Quote:
Originally Posted by Corkpix
I assume you mean a SDHC card in a USB2 card reader. The best
way to test capacity is to write to the card until it is full and then
read back the files to your computer. You can use a stopwatch
to measure transfer rate both ways. I get around 15-20MB/s using
a cheap multi-way card reader and a class 10 SDHC card. I don't
have any way of telling whether the speed bottleneck is the card
or the reader, but anyway, the transfer rate is reasonably close to
the speed claimed by the SDHC card manufacturer.

Your computer file system will probably report any read or
write errors. If you are really paranoid about file integrity, you
could checksum the files with MD5 or something similar.

The only really free software that comes to mind is Linux
or one of the BSDs, dd for the read/write tests and md5sum
for checking file integrity.
Quote:
Originally Posted by dancingpotato
You can use a free program called H2testw 1.4 to verify any flash cards or devices u may have ... it will do everything you are asking.
Quote:
Originally Posted by VTphotog
Small app called Drivespeed will give you r/w speeds, but I don't recall if it checks for errors or not. Windows disc checker will do that on attached mass storage devices though.
Corkpix, dancingpotato and VTphotog,

Sorry for the delayed reply. Yes, I do mean testing a SDHC card in a USB2 card reader. The H2testw 1.4 program looks good. Iíll download that and give it a try. Iím not sure if that test reports r/w speeds but if not, then Iíll give Drivespeed a run.

Thanks all for your help!
Sky
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