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On 03 August, 2007 - John.Karwoski@xxxxxxx sent me these 1,6K bytes:
> When using an array's RAID schemes, what higher level ZFS
> features are not in play when ZFS Stripes/Concats are used without using
> any ZFS RaidZ or mirrors?
>
> I understand from
> http://www.opensolaris.org/os/community/zfs/faq/#hardwareraid
>
> that ZFS can only report errors but not correct them. I think ZFS still
> does copy-on-wite, and rollback on error - these are separate from
> RAID.
>
> Does ZFS round robin the writes across the LUNs when there is no ZFS
> RaidZ or mirrors in play? Or do all the writes go to the first
> LUN until it is full?
Round-robin across all vdevs (single disk, mirror, raidz, raidz2) in a
pool.
> What other ZFS features depend on ZFS RAID ?
Mostly the self-healing stuff.. But if it's not zfs-redundant and a
device experiences write errors, the machine will currently panic.
/Tomas
--
Tomas Ögren, stric@xxxxxxxxxx, http://www.acc.umu.se/~stric/
|- Student at Computing Science, University of Umeå
`- Sysadmin at {cs,acc}.umu.se
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