24.10.2018 13:35, Eugene M. Zheganin wrote: > On 28.04.2018 17:46, Willem Jan Withagen wrote: >> Hi, >> >> I upgraded a server from 10.4 to 11.1 and now al of a sudden the server >> complains about: >> ZFS: Can't find pool by guid >> And I end up in the boot prompt: >> >> lsdev gives disk0 withe on p1 the partion that the zroot is/was. >> >> This is an active server, so redoing install and stuf is nog going to be >> real workable.... >> >> So how do I get this to boot? > The basic scenario for this is when you have a "shadow" pool on the bootable > disks with actual root pool - for example once you had a zfs pool on some > disks that were in dedicated mode, then you extracted these disks without > clearing the zpool labels (and 'zpool destroy' never clears the zpool labels) > and installed the system onto them. This way 'zpool import' will show the old > pool which has no live replicas and no live vdevs. The system on it may be > bootable (and will probably be) until the data gets redistributed in some > way, after that gptzfsboot will start to see the old pool remains, will try > to detect if this pool has bootfs on it - but in this case there's no valid > pool - so it will fall into error and stop working. Actually, the newer 11.2 > gptzfsboot loader has more support of this - it clearly states the pool found > and mentions the error - thanks to all the guys that did a great work on > this, seriously. > > The way to resolve this is to detach disks sequentially from root pool (or > offline them in case of raidz), making 'zpool labelclear' on them (please > keep in mind that 'labelclear' is evil and ignorant, and breaks things > including GPT table) and attaching them back, resilvering, and repeating this > until 'zpool import' will show no old disassembled pools. Determining which > disks have the old labels can be done with 'zdb -l /dev/<disk> | grep name:'. > > I understand that your situation was resolved long ago, I'm writing this > merely to establish a knowledge point if someone will step on this too, like > I did yesterday.
There is quicker and easier way: just rename real pool to another name and use vfs.root.mountfrom=zfs:newpoolname/fs _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
