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I'm really really new to Ubuntu. Which is probably why I'm facing this predicament...

I couldn't load Ubuntu this evening. For whatever reason I could get to the login screen, but absolutely no further on my account or the guest account. The screen simply wouldn't load.

I have four drives. One SSD, three HDDs in a ZFS Raid. Basically a RAID 5. A & B drives = AB on C drive.

My lack of understanding of Ubuntu made me figure I could just re-install the OS which was on the SSD. So, I overwrote the entire installation. I believe I've reinstalled ZFS correctly on Ubuntu. I then attempted to recreate the pool using what I could remember from the settings. Probably not the right thing to do now that I've done it... I'm cursing myself right now.

Running sudo zpool import gives me

/NameDrive$ sudo zpool import pool: NamePool id: 5108504088423678092 state: UNAVAIL status: One or more devices contains corrupted data. action: The pool cannot be imported due to damaged devices or data. see: http://zfsonlinux.org/msg/ZFS-8000-5E config:

QuantumPool  UNAVAIL  insufficient replicas
  raidz1-0  UNAVAIL  insufficient replicas
    sda     UNAVAIL
    sdc     UNAVAIL
    sdd     UNAVAIL

I probably screwed up by trying to remount the drive in the same location. I seriously am freaking out that I've lost all of my data.

Any help is appreciated. It should be abundantly clear I don't know what I'm doing and I'm still learning.

If my data is gone and can't be recovered, just let me know.

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My lack of understanding of Ubuntu made me figure I could just re-install the OS which was on the SSD. So, I overwrote the entire installation. I believe I've reinstalled ZFS correctly on Ubuntu.

That part is fine.

I then attempted to recreate the pool using what I could remember from the settings.

You need to be more explicit about this step in order for us to help you. Did you literally do zpool create ... with the same disks? Did you successfully create a pool? Filesystems on that pool?

Running sudo zpool import gives me ...

This is the right thing to do. But if you started with something destructive (like zpool create) on the same disks then it will require careful steps to get your pool back.

What does zpool import -D say? That will list any "destroyed" pools.

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  • Yeah, I re-created the pool using the zpool create command with the same disks. I successfully created a pool. Mounted that pool to a directory. No files in that directory (same directory as before), same names, etc.
    – user305301
    Commented Jul 14, 2014 at 5:18
  • zpool import -D says "no pools available to import". Thanks for your help Ben.
    – user305301
    Commented Jul 14, 2014 at 5:18
  • zpool create -f QuantumDrive /dev/sda /dev/sdc /dev/sdd
    – user305301
    Commented Jul 14, 2014 at 5:21
  • zfs create -o mountpoint=/QuantumDrive QuantumDrive/stuff
    – user305301
    Commented Jul 14, 2014 at 5:22
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    @user305301 The only other tool available to you is zdb. Specifically zdb -l and zdb -u might be interesting. But I googled your situation, which turns up multiple near-identical examples, and experts claim that the uberblocks (what you'd need to restore, and printed by zdb -u) are all overwritten by zpool create. At this point you need professional data recovery if the files are precious.
    – Ben Jackson
    Commented Jul 14, 2014 at 5:26

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