Hans Reiser <[EMAIL PROTECTED]> writes:

> Just taking a guess, many hard drives have difficult and time-consuming
> procedures that they can go through to read a troublesome block.  These
> can take 20-30 seconds.  Probably if they have to go through these
> procedures, once they finally succeed the smart vendors remap the block.

They should try to rewrite and write verify the block before remapping
it, as there is only a finite amount of spares.

For SCSI drives, there's also J�rg Schilling's "sformat" tool that can
do the "badblocks" stuff directly in the drive rather than through all
the kernel buffers, and can also refresh or reassign bad blocks.

-- 
Matthias Andree

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