Ross wrote: > I'm trying to import a pool I just exported but I can't, even -f doesn't > help. Every time I try I'm getting an error: > "cannot import 'rc-pool': one or more devices is currently unavailable" > > Now I suspect the reason it's not happy is that the pool used to have a ZIL :) >
Correct. What you want is CR 6707530, log device failure needs some work http://bugs.opensolaris.org/view_bug.do?bug_id=6707530 which Neil has been working on, scheduled for b96. > However I know the pool works fine without the ZIL as my ZIL was a ramdisk > and the server's been rebooted a good few times since doing that. There have > been no problems mounting the pool and each time after booting if I wanted a > ramdisk ZIL again I just created a new one and ran zpool replace to add it to > the pool. > > The reason I exported the pool was because my ramdisk was called 'test' and I > wanted to replace it with one called 'rc-pool-zil'. I didn't have enough RAM > to have two disks online at once so to save a reboot I exported the pool, > deleted the 'test' ramdisk and created my new one. > > The only problem is that I can't import the pool any more. I'm beginning to > think I should have rebooted instead... > It still would have failed. > The output of the relevant commands is: > > # zpool import > pool: rc-pool > id: 11547678520047091246 > 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: > > rc-pool UNAVAIL missing device > mirror ONLINE > c1t1d0 ONLINE > c2t0d0 ONLINE > c1t2d0 ONLINE > mirror DEGRADED > c2t1d0 UNAVAIL cannot open > c1t3d0 ONLINE > c2t2d0 ONLINE > mirror ONLINE > c1t4d0 ONLINE > c2t3d0 ONLINE > c1t5d0 ONLINE > mirror ONLINE > c2t4d0 ONLINE > c1t6d0 ONLINE > c2t5d0 ONLINE > mirror ONLINE > c1t7d0 ONLINE > c2t6d0 ONLINE > c2t7d0 ONLINE > > Additional devices are known to be part of this pool, though their > exact configuration cannot be determined. > > # zpool import -f rc-pool > cannot import 'rc-pool': one or more devices is currently unavailable > > Even after a reboot I get the same error. Creating a ramdisk again with the > original name doesn't seem to do anything either. Checking the Sun error > message it says a top level device isn't available and the pool can't be > opened. Well, the only thing it could possibly be is the ZIL, which seems > odd since ZFS could certainly mount the pool fine without it on boot. Can > ZFS really not import a pool if the ZIL is missing? > Yes. Pending the above fix. Prior to the fix, the separate ZIL log was considered to be another top-level vdev. This is why it refuses to import, as it believes it is missing a top-level vdev instead of a (potentially empty) ZIL. > If so, doesn't that make this a potential issue when people do start using > separate media for the ZIL? If the ZIL hardware fails for any reason do you > loose access to your entire pool? What if you're using battery backed nvram > but power is off long enough to wipe the device? What if a server fails and > you need to move the disks to a new chassis? > > Can anybody help me get this pool back online? > If you look in the archives, there was a way to work around this discussed a few months ago. It isn't pretty, and the real fix is in the above CR. -- richard _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
