On Tue, 5 Jul 2011, Lanky Doodle wrote:
I am still undecided as to how to group the disks. I have read elsewhere that raid-z1 is best suited with either 3 or 5 disks and raid-z2 is better suited with 6 or 10 disks - is there any truth in this, although I think this was in reference to 4K sector disks;
The decision to use raid-z1 should be based on the type and size of the drives. If you are using small enterprise-class SAS drives then raid-z1 is ok but if you are using large near-line SAS/SATA or large desktop SATA drives then you should use raid-z2 instead. The reason for this is that you don't want to experience the case where the remaining drives in a raid-z1 experience a failure while you are resilvering to replace a failed drive.
If you have a very good backup system and can afford to restore the whole zfs pool from scratch, then that might be an argument to use raid-z1.
Bob -- Bob Friesenhahn bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
