From owner-freebsd-fs@freebsd.org  Tue Jul 21 07:54:59 2015
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To: freebsd-fs@freebsd.org, "Matthew Seaman" <m.seaman@infracaninophile.co.uk>
Subject: Re: Attach a device to an unimported pool?
References: <55ADA043.5060002@FreeBSD.org>
 <55ADCFFD.8090000@infracaninophile.co.uk>
Date: Tue, 21 Jul 2015 09:54:49 +0200
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From: "Ronald Klop" <ronald-lists@klop.ws>
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On Tue, 21 Jul 2015 06:52:13 +0200, Matthew Seaman  
<m.seaman@infracaninophile.co.uk> wrote:

> On 2015/07/21 02:28, Matthew Seaman wrote:
>> I have an unimportable zpool which is telling me to 'attach the missing
>> devices and try again'
>>
>> The missing devices are a mirrored pair for logs -- they exist and
>> should be readily attachable, but it seems I cannot attach devices to an
>> un-imported pool, and I can't import the pool with out attaching the
>> devices.
>>
>> Any clues as to how to unfuck this system most gratefully received.
>
> Following myself up, because I missed out providing enough useful
> information.
>
> This is a 10.1-RELEASE machine -- I was upgrading it from p5 to p14 and
> changing the vfs.zfs.arc_max setting: nothing that should have been
> anything other than routine.  However the machine wouldn't reboot
> properly, and I have eventually ended up with it booted up from a USB
> stick trying to repair it's boot pool.
>
> I've tried:
>
>    zpool import -R /mnt zroot
>    zpool import -f -R /mnt zroot
>    zpool import -f -F -R /mnt zroot
>    zpool import -f -m /mnt zroot
>
> plus variations on zpool attach ... and zpool replace ... none of which
> has succeeded.
>
> 	Matthew
>
>


I did not try, but can you import the pool readonly?

Ronald.