On Sep 27, 2007, at 12:04 PM, Wojciech Puchar wrote:
It's reasonable to start with something like a:

 dd if=/dev/your_disk of=/dev/null bs=5120

...to at least try reading every sector on the drive as a basic sanity check.

why so small blocks of 10 sectors?

i use bs=64k at least goes faster.

Agreed, but he asked for a stress-test-- arguably, hitting with a size of 512 might be better for that purpose than anything faster. I chose 5120 because many ATA devices seem to have a maximum request/ DMA-transfer size of 16 sectors, and 512 * 10 is convenient and fits under that.


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