On Sat, Apr 3, 2010 at 9:52 PM, Richard Elling <richard.ell...@gmail.com>wrote:
> On Apr 3, 2010, at 5:56 PM, Tim Cook wrote: > > > > On Sat, Apr 3, 2010 at 7:50 PM, Tim Cook <t...@cook.ms> wrote: > >> Your experience is exactly why I suggested ZFS start doing some "right > sizing" if you will. Chop off a bit from the end of any disk so that we're > guaranteed to be able to replace drives from different manufacturers. The > excuse being "no reason to, Sun drives are always of identical size". If > your drives did indeed come from Sun, their response is clearly not true. > Regardless, I guess I still think it should be done. Figure out what the > greatest variation we've seen from drives that are supposedly of the exact > same size, and chop it off the end of every disk. I'm betting it's no more > than 1GB, and probably less than that. When we're talking about a 2TB > drive, I'm willing to give up a gig to be guaranteed I won't have any issues > when it comes time to swap it out. > >> > >> > > that's what open solaris is doing more or less for some time now. > > > > look in the archives of this mailing list for more information. > > -- > > Robert Milkowski > > http://milek.blogspot.com > > > > > > > > Since when? It isn't doing it on any of my drives, build 134, and > judging by the OP's issues, it isn't doing it for him either... I try to > follow this list fairly closely and I've never seen anyone at Sun/Oracle say > they were going to start doing it after I was shot down the first time. > > > > --Tim > > > > > > Oh... and after 15 minutes of searching for everything from > 'right-sizing' to 'block reservation' to 'replacement disk smaller size > fewer blocks' etc. etc. I don't see a single thread on it. > > CR 6844090, zfs should be able to mirror to a smaller disk > http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6844090 > b117<http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6844090%0Ab117>, > June 2009 > -- richard > > Unless the bug description is incomplete, that's talking about adding a mirror to an existing drive. Not about replacing a failed drive in an existing vdev that could be raid-z#. I'm almost positive I had an issue post b117 with replacing a failed drive in a raid-z2 vdev. I'll have to see if I can dig up a system to test the theory on. --Tim
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