On Tue, 11 Jan 2011, Jorgen Lundman wrote:
It would be nice to create a setup similar to zpool create sub1 raidz c0t0d0 c0t1d0 c0t2d0 c0t3d0 c0t4d0 c0t5d0 zpool add sub1 raidz c0t6d0 c0t7d0 c0t8d0 c0t9d0 c0t10d0 c0t11d0 zpool create sub2 raidz c1t0d0 c1t1d0 c1t2d0 c1t3d0 c1t4d0 c1t5d0 zpool add sub2 raidz c1t6d0 c1t7d0 c1t8d0 c1t9d0 c1t10d0 c1t11d0 zpool create pool mirror sub1 sub2 As I could lose a HDD in either external drive cage, or indeed a whole external drive cage (controller/cable/power) without downtime. But I have a feeling I can not do this? What would be recommended?
Nothing is impossible (if you are willing to do part of this outside of zfs) but it is really not so wise to create huge mirror devices like this. It is much better to construct mirror pools using many smaller devices directly. The reason is that if something goes wrong, the failure is more isolated and resilver times are dramatically improved. Overall performance will be improved.
The recommendation would be to add many mirror vdevs such as c0t0d0/c1t0d0. The wasted space would be a bit less than what you proposed since it would avoid the raidz overhead.
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
