My understanding is that parity is spread across all 3 disks in a 3-disk array.
3 disks is the minimum for raid-z array. 4 is the minimum recommended for raid-z2, since you 'lose' 2 disks worth of space to parity in that scenario. Disks don't have to be equal size, but ZFS will use only the lowest common denominator disk as the base size per-device. For example: disk1 = 500GB disk2 = 500GB disk3 = 500GB disk4 = 250GB zpool raidz2 create tank disk1 disk2 disk3 disk4 zfs create tank/storage zfs list NAME USED AVAIL REFER MOUNTPOINT tank/storage 0 500G 500G /tank/storage (approximately) ZFS treats each disk as 250GB :( blake/ On 6/19/07, Huitzi <[EMAIL PROTECTED]> wrote:
I also have two trivial questions (just to be sure). Do the disks have to be equal in size for RAID-Z? In a three disks RAID-Z, can I specify which disk to use for parity? This message posted from opensolaris.org _______________________________________________ opensolaris-help mailing list [email protected]
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