zfs raidz2 - insufficient replicas


 
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Operating Systems Solaris zfs raidz2 - insufficient replicas
# 1  
Old 12-20-2011
zfs raidz2 - insufficient replicas

I lost my system volume in a power outage, but fortunately I had a dual boot and I could boot into an older opensolaris version and my raidz2 7 drive pool was still fine. I even scrubbed it, no errors. However, the older os has some smb problems so I wanted to upgrade to opensolaris11. I accidentally did the auto install option and it overwrote one of my data drives. This is really important data, but fortunately I have a raidz2, so how bad can it be?... BAD! Booting back into the earlier solaris version I cannot access my pool, This is what zpool status shows:

zpool status
pool: brick3
state: UNAVAIL
scrub: none requested
config:
Code:
    NAME        STATE     READ WRITE CKSUM
    brick3      UNAVAIL      0     0     0  insufficient replicas
      raidz2    UNAVAIL      0     0     0  corrupted data
        c12d0   ONLINE       0     0     0
        c11d1   ONLINE       0     0     0
        c10d1   ONLINE       0     0     0
        c10d0   ONLINE       0     0     0
        c8t0d0  ONLINE       0     0     0
        c8t1d0  ONLINE       0     0     0
        c11d0   ONLINE       0     0     0

I tried to export and re-import it, and I get the following message:

zpool import brick3
cannot import 'brick3': invalid vdev configuration

please please please help, what do I do.

Last edited by Yogesh Sawant; 12-22-2011 at 04:13 AM.. Reason: added code tags
# 2  
Old 12-20-2011
Post output from:
Code:
zpool status -x

# 3  
Old 12-20-2011
I wanted to update this thread in case anyone is stupid enough to have this same problem. In desperation I installed the new opensolaris11 on a the right drive this time, and then I was able to import my pool in a degraded but functional state. Since this is a raidz2 pool I should be able to restore just fine. I don't know what opensolaris11 did to my pool, but then again I don't really care either if I can have my data back. Whew that was scary. I vow to back up everything really important. zfs is great but you can still loose everything in the blink of an eye.
# 4  
Old 12-22-2011
I thought I was OK, but zpool scrub hangs forever at 20% across multiple cold boots, and importing from oracle solaris 11 live hangs forever... I what do I do now, older versions of open solaris will not import the pool anymore...

---------- Post updated at 07:36 AM ---------- Previous update was at 12:48 AM ----------

Well it's 4AM and now I am getting mad. I think this whole bloody mess is caused by Oracle's 'great new solaris 11' package. My advice, don't touch this piece.

To recap, I wanted to try the best newest Solaris release for my super critical file server, so I downloaded from Oracle what I thought was the right iso. I booted, and just as the boot menu came up I got a phone call. When I came back the thing had automatically installed a new version of solaris over one of the drives in the zpool. (BAD #1 ).

Since I have a raidz2 I wasn't too worried ( at first ) and I booted into my original 2009 opensolaris. However, I got the errors shown in the above posts. I exported and could not re-import my pool. Oracale had done something to that drive breaking my entire pool even though it is a radz2 and should be tolerant of 2 drive failures at the same time. ( BAD #2 ).

Since I could do nothing with my pool with my old OS, I tried on the new Oracle solaris, and could indeed import my pool in degraded state because of the one overwritten drive. Fine, I wanted to scrub everything first ( I don't know if this was wise or not ) so I did zpool scrub, which eventually hung forever at 11%. All access to the drive was similarly hung. Rebooting the machine did not change this situation which seemed increasingly dire ( BAD #3 )

I finally got out of this problem by unplugging drives to fault the pool and rebooting in single user mode. Eventually I was able to stop the scrub with the "zpool scrub -s" command, in single user mode. And when I rebooted, I could access my pool again. My first priority at this point was to back up all data immediately. I began to copy off my most important stuff, but unfortunately before I could copy even a fraction off the file system hung again ( BAD #4 ).

Googling around I found most causes for hanging zpool commands are related to hardware failure, so going on a hunch, I figured Oracle phased out or screwed up the drivers for my disks. I still could not import my pool in the old opensolaris OS, because of whatever the Oracle install wrote on that drive. So I booted in Oracle solaris, in single user mode, and did "zpool offline <pool> <drive>" and it worked! Then I rebooted into good old opensolaris, and imported my pool. It worked!!!!

So at this point it is now more like 5AM and I have backed up most of my critical data, way more than I could before anyway. It appears at this point that I was correct and the drivers for either my motherboard or my hard drive controller card were broken by the Oracle release in a way that let it silently trash my zpool. I have a SIIG 2 drive sata and a MSI n1996 motherboard, not sure which the problem is with, but whichever, it works fine in opensolaris 2009 and previous versions.

I just want to warn people that are not real Solaris experts from even trying this Oracle package. Personally I am migrating to fbsd as soon as I can...
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