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Date: Tue, 23 Oct 2012 23:08:55 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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To: Michael Schmiedgen <schmiedgen@gmx.net>
Subject: Re: ZFS cache devs UNAVAIL
References: <5085CF5E.5020500@gmx.net>
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Cc: freebsd-current@FreeBSD.org, "Matthew D. Fuller" <fullermd@over-yonder.net>
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on 23/10/2012 20:56 Michael Schmiedgen said the following:
> FreeBSD 10.0-CURRENT #0: Tue Oct 23 00:14:32 CEST 2012
>     root@gizeh.smoke:/usr/obj/usr/src/sys/GIZEH amd64
...
> vdev_geom_open_by_path:519[1]: guid mismatch for provider /dev/ada0p1:
> 5267967234359339128 != 0.

Thank you for this valuable information.

Do you have a rough estimate of when you started to experience this issue?

Could you please also provide output of the following command captured right
after a reboot and then after you re-add the cache disks?
$ zdb -lll /dev/ada0p


-- 
Andriy Gapon