Date: Wed, 20 Feb 2013 17:06:27 +0200 From: Jonni Nakari <jonni@egarden.fi> To: freebsd-questions@freebsd.org Subject: Re: ZFS pool data recovery Message-ID: <5124E673.8090904@egarden.fi> In-Reply-To: <5122355E.3040506@egarden.fi> References: <5122355E.3040506@egarden.fi>
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On 18.02.2013 16:06, Jonni Nakari wrote: > I started "zpool import -nfFX vault" but it seems to take quite long. > > Some more information about my system: > zpool vault consists of 5 block devices: > whole disks: ada1, ada2, ada3 > cache: ada0s1e > log: ada0s1d > > The system boots from a UFS filesystem ada0s1a. The command root@:/root # zpool import -nfFX vault returned after few hours: Would be able to return vault to its state as of Sun Feb 17 03:07:36 2013. Would discard approximately 20 minutes of transactions. So I ran root@:/root # zpool import -fFX vault and few hours later returned: Pool vault returned to its state as of Sun Feb 17 03:07:36 2013. Discarded approximately 20 minutes of transactions. After that I could import the pool in the memstick environment. I unmounted all ZFS file systems and exported the zpool and rebooted. However when the system boots from the UFS root it fails to mount root from ZFS: Trying to mount root from zfs:vault/root []... Mounting from zfs:vault/root failed with error 2. To get the system booting from ZFS root I tried several things including: - recreating the /boot/zfs/zpool.cache, - cloning the vault/root file system to vault/new_root, - setting the mountpoint of the root file system to / and legacy, - removed the cache and log devices from the zpool. I finally gave up and copied the contents of the vault/root file system to a UFS file system at ada0s1d and changed the system to mount root from there. /tmp, /usr and /var are mounted fine from the ZFS. I really would like to back using the ZFS root file system. I documented the commands I used in the memstick environment and dmesgs of the failing ZFS boots and made them available here: http://upload.egarden.fi/ultra40_zfs_fail Maybe someone can figure out what I'm doing wrong? Before the suspend to RAM incident the system booted up just fine. I used the following trick to get the dmesgs: when the system booted up and failed to mount the ZFS root I entered ufs:da0 to the mountroot> prompt to get in to the memstick environment. -- Jonni Nakari jonni@egarden.fi +358 50 4411 784
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