[Discuss] btrfs

[Rich Pieri]

On Wed, 27 Feb 2013 02:50:16 +0000
"Edward Ned Harvey (blu)" <blu at nedharvey.com> wrote:

> Or a vdev can be raidzN, where raidz1 has the redundancy to survive a
> single device failure, and behind the scenes, is implemented similar
> to raid-1e.

RAID-Z is not at all like RAID-1E. RAID-Z uses the same basic data and
parity distribution as RAID-5 with atomic writes and checksums and
other "magic" to ensure that there are no write holes.

RAID-Z2 is RAID-Z with double parity data similar to RAID-6. RAID-Z3 is
RAID-Z with triple parity data.

RAID-1E is a striping + mirroring mechanism where data stripe mirrors
are distributed across the other devices in the set.

-- 
Rich P.