> I have noted there is now raidz2 and been thinking witch woul be > better. > A pool with 2 mirrors or one pool with 4 disks raidz2
If you use raidz2, made of 4 disks, you will have usable capacity of 2 disks, and you can tolerate any 2 disks failing. If you use 2 mirrors, you will have a total of 4 disks and usable capacity of 2 disks. Your redundancy is not quite as good as above ... You could survive a failed disk in the first mirror, and a failed disk in the second mirror, but you could not survive two failed disks that are in the same mirror. If you use raidz2, your reliability might be a little bit higher. If you use 2 mirrors, your performance will certainly be higher for random IO operations. So you must choose what you care about more: Performance or reliability. Both ways are good ways. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
