My experience has always been that ZFS tries hard to keep you from doing something wrong when devices are failing or otherwise unavailable. With mirrors, it will import with a device missing from a mirror vdev. I don't use cache or log devices in my mainly storage pools, so I've not seen a failure with a "required" device like that missing. But, I've seen problems with a raid-z missing and the pool not coming on line.
As Richard says, it would seem there is a cache or log vdev missing since it is showing 1 of 2 mirrored devices in that vdev missing, but still complaining about a missing device. The older OS and ZFS version may in fact have a misbehavior due to some error condition not being correctly managed. Gregg Wonderly On Aug 2, 2012, at 4:49 PM, Richard Elling <richard.ell...@gmail.com> wrote: > > On Aug 1, 2012, at 12:21 AM, Suresh Kumar wrote: > >> Dear ZFS-Users, >> >> I am using Solarisx86 10u10, All the devices which are belongs to my zpool >> are in available state . >> But I am unable to import the zpool. >> >> #zpool import tXstpool >> cannot import 'tXstpool': one or more devices is currently unavailable >> ====================== >> bash-3.2# zpool import >> pool: tXstpool >> id: 13623426894836622462 >> state: UNAVAIL >> status: One or more devices are missing from the system. >> action: The pool cannot be imported. Attach the missing >> devices and try again. >> see: http://www.sun.com/msg/ZFS-8000-6X >> config: >> >> tXstpool UNAVAIL missing device >> mirror-0 DEGRADED >> c2t210100E08BB2FC85d0s0 FAULTED corrupted data >> c2t210000E08B92FC85d2 ONLINE >> >> Additional devices are known to be part of this pool, though their >> exact configuration cannot be determined. >> > > This message is your clue. The pool is missing a device. In most of the cases > where I've seen this, it occurs on older ZFS implementations and the missing > device is an auxiliary device: cache or spare. > -- richard > > -- > ZFS Performance and Training > richard.ell...@richardelling.com > +1-760-896-4422 > > > > > > > > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
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