> ZFS includes support for RAID0 (stripe), RAID1 (mirroring), RAID5 and RAID6 > (raidz1/raidz2), and (soon in OpenSolaris) RAID7 (raidz3). Why would you > want to build a pool out of devices that are already RAID'd together?
Because gmirror type RAIDing is more appropriate for your application than ZFS RAID ? I am not the original poster, but I can easily see why one would want to do do this. For example making a gmirror of a local drive and a remote drive - you can ask gmirror to prefer reads on the local disc, but there isn't a way to specify that in ZFS that I know of. Also gmirror on top of ggate behaves nicely if the remote drive fails. ZFS does not behave nicely at all - or it didn't when I ran tests. I havent tried on the latest version I admit. But ZFS as a filesystem still has many significant advantages, so runnng it on top of gmirror is actually a worthwhile thing to do. -pete. _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
