david@xxxxxxx wrote:
On Thu, 21 Jun 2007, David Chinner wrote:
one of the 'killer features' of zfs is that it does checksums of every
file on disk. so many people don't consider the disk infallable.
several other filesystems also do checksums
both bitkeeper and git do checksums of files to detect disk corruption
How different is that to raid1/5/6 being set to a 'paranoid' "read-verify" mode
(as per Dan's recent email) where a read reads from _all_ spindles and verifies
(and with R6 maybe corrects) the stripe before returning it?
Doesn't solve DaveC's issue about the fs doing redundancy but isn't that
essentially just fs level mirroring?
David
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