On Sat, Aug 05, 2017 at 06:56:31PM -0700, Dan Williams wrote:
> On Sat, Aug 5, 2017 at 8:51 AM, Shaohua Li <s...@kernel.org> wrote:
> > From: Shaohua Li <s...@fb.com>
> >
> > Sometime disk could have tracks broken and data there is inaccessable,
> > but data in other parts can be accessed in normal way. MD RAID supports
> > such disks. But we don't have a good way to test it, because we can't
> > control which part of a physical disk is bad. For a virtual disk, this
> > can be easily controlled.
> >
> > This patch adds a new 'badblock' attribute. Configure it in this way:
> > echo "+1-100" > xxx/badblock, this will make sector [1-100] as bad
> > blocks.
> > echo "-20-30" > xxx/badblock, this will make sector [20-30] good
> 
> Did you happen to overlook block/badblocks.c, or did you find it unsuitable?

Hmm, I overlooked at it indeed, thought I don't need those features of
badblocks without double checking the code. Will use badblocks interface in
next post.

Thanks,
Shaohua

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