On 05/12/2012 19:05, Martin K. Petersen wrote:
"Pasi" == Pasi Kärkkäinen <pasik@xxxxxx> writes:
Pasi> (Added CC to Martin in the case he has some thoughts about generic
Pasi> Linux checksumming RAID without T10 PI disks..)
There have been a few attempts at a checksumming DM target. However, I
think btrfs is a much better solution for this stuff.
I think there's room for both. Checksumming at the block level, below md
RAID so presumably in a DM target, could help avoid silent data
corruption in such a way that the md layer could reconstruct valid data.
Checksumming at the filesystem level doesn't give you reconstruction -
unless you add redundancy/RAID functions into the filesystem, which is a
whole other discussion.
Cheers,
John.
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