The fact that it's DEGRADED and not FAULTED indicates that it thinks the DTL (dirty time logs) for the two sides of the mirrors overlap in some way, so detaching it would result in loss of data. In the process of doing this, it seems the error message got lost, and you ended up with something completely non-sensical. If you do a 'zpool scrub', does it complete without any errors?
- Eric On Fri, Aug 15, 2008 at 01:48:48PM -0700, Nils Goroll wrote: > Hi, > > I thought that this question must have been answered already, but I have > not found any explanations. I'm sorry in advance if this is redundant, but: > > Why exactly doesn't ZFS let me detach a device from a degraded mirror? > > haggis:~# zpool status > pool: rmirror > state: DEGRADED > status: One or more devices has experienced an unrecoverable error. An > attempt was made to correct the error. Applications are unaffected. > action: Determine if the device needs to be replaced, and clear the errors > using 'zpool clear' or replace the device with 'zpool replace'. > see: http://www.sun.com/msg/ZFS-8000-9P > scrub: none requested > config: > > NAME STATE READ WRITE CKSUM > rmirror DEGRADED 0 0 0 > c15t0d0s0 ONLINE 0 0 0 > c16t0d0s0 DEGRADED 0 0 0 too many errors > > errors: No known data errors > > haggis:~# zpool detach rmirror c16t0d0s0 > cannot detach c16t0d0s0: only applicable to mirror and replacing vdevs > > Background: My system was crashing twice during a zpool scrub, > so I thought I should avoid a third scrubbing attemt and rather detach > and re-attach the mirror to achieve a full re-sync. > > this is snv_93 > > Ref: > > http://docs.sun.com/app/docs/doc/817-2271/gcfhe?l=en&a=view&q=%22only+applicable+to+mirror+and+replacing+vdevs%22 > > > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss -- Eric Schrock, Fishworks http://blogs.sun.com/eschrock _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
