On 22-Dec-09, at 3:33 PM, James Risner wrote:
...
Joerg Moellenkamp:
I do "consider RAID5 as 'Stripeset with an interleaved
Parity'", so I don't agree with the strong objection in this thread
by many about the use of RAID5 to describe what raidz does. I
don't think many particularly care about the nuanced differences
between hardware card RAID5 and raidz, other than knowing they
would rather have raidz over RAID5.
These are hardly "nuanced differences". The most powerful
capabilities of ZFS simply aren't available in RAID.
* Because ZFS is labelled a "filesystem", people assume it is
analogous to a conventional filesystem then make misleading
comparisons which fail to expose the profound differences;
* or people think it's a RAID or volume manager, assume it's just
RAID relabelled, and fail to see where it goes beyond.
Of course it is neither, exactly, but a synthesis of the two which is
far more capable than the two conventionally discrete layers in
combination. (I know most of the list knows this :)
--Toby
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