you can't without forcing...and even if you do, it's not a good idea.
if you do your pool will have the lowest redundancy/speed of the worst one... sooo if you add a single drive to a raidz vdev, your entire pool loses it's redundancy, if you add a single drive to a mirror, likewise if you add a raidz group to a group of 3 mirrors, the entire pool slows down to the speed of the raidz..... while you technically CAN do it, it's a horrible idea. On Sun, Sep 6, 2009 at 2:19 PM, Al Lang <al...@pobox.com> wrote: > The "limitations" section of the Wikipedia article on ZFS currently > includes the statement: > > "You cannot mix vdev types in a zpool. For example, if you had a striped > ZFS pool consisting of disks on a SAN, you cannot add the local-disks as a > mirrored vdev." > > As I understand it, this is simply wrong. You can add any kind of vdev to > any zpool. Right? > > As I understand it, mixing vdev types is in general a bad idea. The > reliability of a zpool is dictated by its least reliable vdev and the > performance of a zpool tends to be limited by its lowest-performing vdevs. > So mixing vdev types tends to give you the worst of all possible worlds. > > But this is merely a logical consequence of mixing storage types, not > anything to do with ZFS. Precisely analogous considerations would apply when > setting up RAID-10, for example. > > Do I have that right? > > Cheers, > Al. > -- > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss >
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