> On Tue, Jul 18, 2006 at 01:27:21AM -0700, Jeff Bonwick wrote: > > > Of course the re-writing must be 100% safe, but that can be done with COW > > > quite easily. > > > > the ability to remap blocks would be *so* useful -- it would > > enable compression of preexisting data, removing devices from > > a pool, automatically moving cold data to slower devices, etc. > > Being able to remove devices from a pool would be a good thing. I can't > personally think of any reason that I would ever do it, but a friend of > mine keeps asking me why it can't do it and that it should be able to.
Recovery from mistakes. If you're perfect, you'll never need it. :-) I've certainly seen messages from people that accidentally added their last disk into a netapp volume. Now they have no spares and they can't get it back without destroying the volume or adding (significant) hardware. Today, the fact that mirrors auto-resize without asking leads to some similar issues if the components are not the same size. Being able to shrink it down would allow recovery in that case. -- Darren Dunham [EMAIL PROTECTED] Senior Technical Consultant TAOS http://www.taos.com/ Got some Dr Pepper? San Francisco, CA bay area < This line left intentionally blank to confuse you. > _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
