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