On Mar 4, 2011, at 10:01 AM, Tim Cook wrote: > > > On Fri, Mar 4, 2011 at 10:22 AM, Robert Hartzell <b...@rwhartzell.net> wrote: > In 2007 I bought 6 WD1600JS 160GB sata disks and used 4 to create a raidz > storage pool and then shelved the other two for spares. One of the disks > failed last night so I shut down the server and replaced it with a spare. > When I tried to zpool replace the disk I get: > > zpool replace tank c10t0d0 > cannot replace c10t0d0 with c10t0d0: device is too small > > The 4 original disk partition tables look like this: > > Current partition table (original): > Total disk sectors available: 312560317 + 16384 (reserved sectors) > > Part Tag Flag First Sector Size Last Sector > 0 usr wm 34 149.04GB 312560350 > 1 unassigned wm 0 0 0 > 2 unassigned wm 0 0 0 > 3 unassigned wm 0 0 0 > 4 unassigned wm 0 0 0 > 5 unassigned wm 0 0 0 > 6 unassigned wm 0 0 0 > 8 reserved wm 312560351 8.00MB 312576734 > > Spare disk partition table looks like this: > > Current partition table (original): > Total disk sectors available: 312483549 + 16384 (reserved sectors) > > Part Tag Flag First Sector Size Last Sector > 0 usr wm 34 149.00GB 312483582 > 1 unassigned wm 0 0 0 > 2 unassigned wm 0 0 0 > 3 unassigned wm 0 0 0 > 4 unassigned wm 0 0 0 > 5 unassigned wm 0 0 0 > 6 unassigned wm 0 0 0 > 8 reserved wm 312483583 8.00MB 312499966 > > So it seems that two of the disks are slightly different models and are about > 40mb smaller then the original disks. > > I know I can just add a larger disk but I would rather user the hardware I > have if possible. > 1) Is there anyway to replace the failed disk with one of the spares? > 2) Can I recreate the zpool using 3 of the original disks and one of the > slightly smaller spares? Will zpool/zfs adjust its size to the smaller disk? > 3) If #2 is possible would I still be able to use the last still shelved disk > as a spare? > > If #2 is possible I would probably recreate the zpool as raidz2 instead of > the current raidz1. > > Any info/comments would be greatly appreciated. > > Robert > > > > > You cannot. That's why I suggested two years ago that they chop off 1% from > the end of the disk at install time to equalize drive sizes. That way you > you wouldn't run into this problem trying to replace disks from a different > vendor or different batch. The response was that Sun makes sure all drives > are exactly the same size (although I do recall someone on this forum having > this issue with Sun OEM disks as well). It's ridiculous they don't take into > account the slight differences in drive sizes from vendor to vendor. Forcing > you to single-source your disks is a bad habit to get into IMO. > > --Tim >
Well that sucks... So I guess the only option is to replace the disk with a larger one? Or are you saying thats not possible either? I can upgrade to larger disks but then there is no guarantee that I can even buy 4 identical disks off the shelf at any one time. Thanks for the info -- Robert Hartzell b...@rwhartzell.net RwHartzell.Net, Inc.
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