On Sat, 6 Aug 2011, Rob Cohen wrote:

I may have RAIDZ reading wrong here.  Perhaps someone could clarify.

For a read-only workload, does each RAIDZ drive act like a stripe, similar to RAID5/6? Do they have independant queues?

They act like a stripe like in RAID5/6.

It would seem that there is no escaping read/modify/write operations for sub-block writes, forcing the RAIDZ group to act like a single stripe.

True.

Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
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