[Flashbench] flashbench result for Transcend Micro SD card adapter and unknown class 3941376 KB micro SD card

[Arnd Bergmann]

On Sunday 24 April 2011 18:05:01 Amit Pundir wrote:
> 
> Forgot to add --findfat result, here it goes
> 
> $ sudo ./flashbench --findfat /dev/mmcblk0
> 4MiB    2.73M/s  3.76M/s  3.77M/s  3.77M/s  3.77M/s  3.78M/s
> 2MiB    3.52M/s  3.77M/s  3.75M/s  3.77M/s  3.77M/s  3.77M/s
> 1MiB    3.52M/s  3.76M/s  3.76M/s  3.76M/s  3.76M/s  3.76M/s
> 512KiB  3.52M/s  3.76M/s  3.76M/s  3.76M/s  3.76M/s  3.76M/s
> 256KiB  3.52M/s  3.76M/s  3.76M/s  3.76M/s  3.76M/s  3.76M/s
> 128KiB  3.5M/s   3.75M/s  3.74M/s  3.75M/s  3.74M/s  3.75M/s
> 64KiB   3.5M/s   3.74M/s  3.72M/s  3.72M/s  3.74M/s  3.74M/s
> 32KiB   3.09M/s  3.52M/s  3.52M/s  3.52M/s  3.48M/s  3.51M/s
> 16KiB   2.56M/s  2.72M/s  2.73M/s  2.72M/s  2.74M/s  2.74M/s
> 

On Sun, Apr 24, 2011 at 9:32 PM, Amit Pundir <pundiramit at gmail.com> wrote:
> Card details:
>
> cid = 744a455553442020104180008e00b200
> csd = 400e00325b5900001e117f800a400000
> date = 02/2011
> fwrev = 0x0
> hwrev = 0x1
> manfid = 0x000074
> name = USD
> oemid = 0x4a45
> scr = 0235800000000000
> serial = 0x4180008e
> type = SD

Thanks for the additional info. Note that you should also
use the '--erasesize=$[1 * 1024 * 1024]' in the findfat
test run, otherwise it will assume 4 MB. Also, it's helpful
to use '--random --blocksize=2048' there, as it makes the results
easier to interpret in some cases.

For this card, it seems like the first 4 MB contain a special
area, they perform worse in linear access than the next five
4MB sections, which all perform the same. It would be nice
to know whether the entire 4 MB are special or just part of it.

	Arnd