On 3/3/13 8:02 AM, Trey Dockendorf wrote:

> However the checksumming in ZFS only takes place on RAIDZ sets.

ZFS actually always checksums and error detection, also on RAID1 and
RAID0. For RAID0 there is no redundant data to attempt correction with.
For RAID1 there is a copy of the data to use for correction.

> ZFS mirroring (RAID 1) does not do checksum verification.

That's wrong, it certainly does, also with error correction.

Read up on it here:
https://blogs.oracle.com/bonwick/entry/zfs_end_to_end_data

-- 
Best regards,
Lars Tobias

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