Date: Fri, 13 Oct 2006 03:47:53 -0400 From: James Snow <snow@teardrop.org> To: Andrew - Supernews <andrew@supernews.net> Cc: ade@freebsd.org, freebsd-geom@freebsd.org Subject: Re: gmirror panics on startup, and some other cases Message-ID: <20061013074753.GA39440@teardrop.org> In-Reply-To: <E1G3Nqb-000BqI-Iv@trinity.supernews.net> References: <E1G3Nqb-000BqI-Iv@trinity.supernews.net>
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On Thu, Jul 20, 2006 at 03:00:52AM +0100, Andrew - Supernews wrote: > Running RELENG_6 as of June 21 2006, we ran into what looks like a > couple of related gmirror bugs relating to synchronization problems > during destruction. In the worst case these can cause a kernel panic > before reaching single-user mode, if geom_mirror is loaded from > loader.conf. I recently encountered this same problem, also in RELENG_6. My disk was a removable one, so attaching it to the system would bring the system down when gmirror tasted the disk. Since all I really wanted was to mount the underlying filesystems to copy data off the disk, I found myself wanting for a way to tell gmirror to simply not taste the disk when it was inserted. I worked around my problem and got my data, but I still wondered: Is there a way to tell gmirror or geom to completely ignore a particular disk? If I could have done that, presumably I could have written new gmirror labels to this disk - overwriting the corrupted ones - and gone on my merry way. -Snow
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