On Tue, Apr 15, 2008 at 12:12 PM, Bob Friesenhahn <[EMAIL PROTECTED]> wrote: > On Tue, 15 Apr 2008, Brandon High wrote: > > I think RAID-Z is different, since the stripe needs to spread across > > all devices for protection. I'm not sure how it's done. > > My understanding is that RAID-Z is indeed different and does NOT have to > spread across all devices for protection. It can use less than the total > available devices and since parity is distributed the parity could be > written to any drive.
I think you're right. The parity information for a block has to be written to a second (or third for raidz2) vdev to qualify as a "full stripe write", but this is not necessarily writing to all devices in the zpool. -B -- Brandon High [EMAIL PROTECTED] "The good is the enemy of the best." - Nietzsche _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
