On Fri, Mar 19, 2010 at 2:34 PM, taemun <tae...@gmail.com> wrote: > A pool with a 4-wide raidz2 is a completely nonsensical idea. It has the > same amount of accessible storage as two striped mirrors. And would be > slower in terms of IOPS, and be harder to upgrade in the future (you'd need > to keep adding four drives for every expansion with raidz2 - with mirrors > you only need to add another two drives to the pool). > Just my $0.02 >
but it can survive on failure of 2 random disks in the pool. In striped mirror: mirror1 diskA diskB mirror2 diskC diskD In event diskA and diskB (or diskC and diskD) failed together, entire pool is lost. In raidz2: raidz2-1 diskA diskB diskC diskD Any combination of 2 disks can fail at same time and the pool will still intact. -- O< ascii ribbon campaign - stop html mail - www.asciiribbon.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
