Forcing full file read in ZFS even when checksum error encountered

Dag-Erling Smørgrav des at des.no
Tue Feb 5 17:22:39 UTC 2008


Joe Peterson <joe at skyrush.com> writes:
> Dag-Erling Smørgrav <des at des.no> writes:
> > There is now way to "read the bad data" since an unrecoverable
> > checksum error means that ZFS has no idea which of the multiple
> > version of the affected block is the right one.
> Nope, no mirror, no RAIDZ - just one partition.  But as far as I know, there
> were no read errors, just a checksum error.

A checksum error results from a read error.  Check your drive's SMART
error log if it has one.  It might not be detectable in a surface scan,
as the damaged sector will be automatically reassigned if it's written
to (which ZFS may very well have done)

DES
-- 
Dag-Erling Smørgrav - des at des.no


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