[Flashbench] Results for Sandisk class 4 "SDHC card"

[Sascha Silbe]

Excerpts from Arnd Bergmann's message of Mon Apr 04 04:27:52 +0200 2011:

> This is not well supported in flashbench, but what you can try is pass a blocksize
> and erasesize that are a multiple of three:
> 
> flashbench -a /dev/mmcblk0 --blocksize=1536 --count=100

I'm afraid that doesn't work:

flashtest at flatty:~/flashbench$ time ./flashbench -a /dev/mmcblk0 --blocksize=1536 --count=100
time_read: Invalid argument
time_read: Invalid argument
time_read: Invalid argument
[...]

physical_block_size, hw_sector_size, logical_block_size and
minimum_io_size all read 512, so I don't understand why the pread()
fails with odd multiples of 512 (512, 1536, 2560). Multiples of 1024
(1024, 2048, 3072) work fine.

Sascha

-- 
http://sascha.silbe.org/
http://www.infra-silbe.de/
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