> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Tom Tang > > I understand people always say ZFS doesn't prefer HW RAID.
A better way to say it is like this: ZFS does raid better than HW raid. It's both faster and more reliable. The only exception is sometimes HW can resilver faster than ZFS, depending on how full your disks are, and how it is laid out on disk. > HW RAID0 is only for stripping (allows higher data transfer rate), There is no reason to do this. ZFS does striping better and faster than HW. > while the actual RAID5 (i.e. RAIDZ) is done via ZFS which takes care all the > checksum/error detection/auto-repair. You're talking about a 20-way raidz. Definitely don't do that. A resilver will probably never complete on that pool. If you're trying to achieve 1/20 redundancy... I don't know any good way to do that. Most people would probably advise you make a bunch of 8-way raidz's or something like that. I know 1/8 is not the same as 1/20, but it's the closest I think you can come reasonably safely. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
