Re: How to destroy a zombie zpool
--As of January 17, 2012 5:19:15 AM +0100, Fritz Wuehler is alleged to have said: zfs is famous for fucking itself like this. the only totally safe way is to dd the drive since nailing the label doesn't clear out stuff at the far end of the filesystem that can really ruin your day. don't ask me how i know.. it will take a few hours dd'ing from /dev/zero to your devices but it is well worth it when you do any major surgery on drives that had zfs at one point and you want to use them over again with zfs --As for the rest, it is mine. Thanks; I finally had some more time to play with this box again, and that did the trick. Took less than 2 hours, to do two drives. ;) (Simultainously, and one's a SSD.) (Well, I still can't figure out why I can't *boot* into ZFS, but at least I've eliminated one variable.) Daniel T. Staal --- This email copyright the author. Unless otherwise noted, you are expressly allowed to retransmit, quote, or otherwise use the contents for non-commercial purposes. This copyright will expire 5 years after the author's death, or in 30 years, whichever is longer, unless such a period is in excess of local copyright law. --- ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: How to destroy a zombie zpool
I agree if you move drives and a particular zfs has not seen them before - and
there is a zfs label at the end things can go pear shaped - however…
if you blast just the end of the drive it should be fine.
RB
Ps. Maybe I;ll title a book fun with zfs and glabel or cheap thrills with zfs,
glabel and gpt uuid's - how to screw up MacOS/Darwin the easy way…
On Jan 16, 2012, at 11:19 PM, Fritz Wuehler wrote:
>> I've got a weird problem... I was working on installing 9.0 w/zfs on my
>> laptop, messed up, rebooted, *formatted the drives* and restarted. Got
>> much further the next time, however...
>>
>> There is a zombie copy of the old zpool sitting around interfering with
>> things. 'zpool import' lists it, but it can't import it because the disks
>> don't actually exist. 'zpool destroy' can't delete it, because it's not
>> imported. ('No such pool') Any ideas on how to get rid of it?
>
> zfs is famous for fucking itself like this. the only totally safe way is to
> dd the drive since nailing the label doesn't clear out stuff at the far end
> of the filesystem that can really ruin your day. don't ask me how i know..
>
> it will take a few hours dd'ing from /dev/zero to your devices but it is
> well worth it when you do any major surgery on drives that had zfs at one
> point and you want to use them over again with zfs
>
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Re: How to destroy a zombie zpool
> I've got a weird problem... I was working on installing 9.0 w/zfs on my
> laptop, messed up, rebooted, *formatted the drives* and restarted. Got
> much further the next time, however...
>
> There is a zombie copy of the old zpool sitting around interfering with
> things. 'zpool import' lists it, but it can't import it because the disks
> don't actually exist. 'zpool destroy' can't delete it, because it's not
> imported. ('No such pool') Any ideas on how to get rid of it?
zfs is famous for fucking itself like this. the only totally safe way is to
dd the drive since nailing the label doesn't clear out stuff at the far end
of the filesystem that can really ruin your day. don't ask me how i know..
it will take a few hours dd'ing from /dev/zero to your devices but it is
well worth it when you do any major surgery on drives that had zfs at one
point and you want to use them over again with zfs
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Re: How to destroy a zombie zpool
On Mon, Jan 16, 2012 at 8:37 AM, Daniel Staal wrote:
> There is a zombie copy of the old zpool sitting around interfering with
> things. 'zpool import' lists it, but it can't import it because the disks
> don't actually exist. 'zpool destroy' can't delete it, because it's not
> imported. ('No such pool') Any ideas on how to get rid of it?
It sounds like your /boot/zfs/zpool.cache file still has the pool
listed. I can't find definitive documentation to this end, but I
think "zpool export " might remove the entry from the zpool
cache.
If that still doesn't work (and you haven't yet put another filesystem
on those disks), you might get buy with using dd to wipe the first and
last several MB of the disk/partitions that had been in the pool. Of
course, if the disks have already been re-used or removed, then zfs
shouldn't be finding them when it scans the device nodes.
Hope this helps,
Matt Mullins
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Re: How to destroy a zombie zpool
most likely a ifs "label" on the disk from before that you need to get rid of
before doing the install.
RB
On Jan 16, 2012, at 11:37 AM, Daniel Staal wrote:
>
> I've got a weird problem... I was working on installing 9.0 w/zfs on my
> laptop, messed up, rebooted, *formatted the drives* and restarted. Got much
> further the next time, however...
>
> There is a zombie copy of the old zpool sitting around interfering with
> things. 'zpool import' lists it, but it can't import it because the disks
> don't actually exist. 'zpool destroy' can't delete it, because it's not
> imported. ('No such pool') Any ideas on how to get rid of it?
>
> Daniel T. Staal
>
> ---
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> expire 5 years after the author's death, or in 30 years,
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> local copyright law.
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How to destroy a zombie zpool
I've got a weird problem... I was working on installing 9.0 w/zfs on my
laptop, messed up, rebooted, *formatted the drives* and restarted. Got
much further the next time, however...
There is a zombie copy of the old zpool sitting around interfering with
things. 'zpool import' lists it, but it can't import it because the disks
don't actually exist. 'zpool destroy' can't delete it, because it's not
imported. ('No such pool') Any ideas on how to get rid of it?
Daniel T. Staal
---
This email copyright the author. Unless otherwise noted, you
are expressly allowed to retransmit, quote, or otherwise use
the contents for non-commercial purposes. This copyright will
expire 5 years after the author's death, or in 30 years,
whichever is longer, unless such a period is in excess of
local copyright law.
---
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