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Date:      Thu, 27 Apr 2006 10:54:51 +0200
From:      Pawel Jakub Dawidek <pjd@FreeBSD.org>
To:        "Ian A. Tegebo" <yontege@rescomp.berkeley.edu>
Cc:        freebsd-geom@freebsd.org
Subject:   Re: Failure Detection
Message-ID:  <20060427085451.GA20828@garage.freebsd.pl>
In-Reply-To: <20060426214402.GA2496@rescomp.berkeley.edu>
References:  <20060426214402.GA2496@rescomp.berkeley.edu>

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On Wed, Apr 26, 2006 at 02:44:04PM -0700, Ian A. Tegebo wrote:
+> I'm trying to write a nagios check that will run on my gmirror hosts.  I=
'd=20
+> like to know what I should look for to be able to determine if a failure=
=20
+> has occurred.
+>=20
+> I took a look at the man pages: gmirror, geom, vinum, and so on but
+> couldn't find much information about state (DIRTY for instance).  After
+> searching this list some, I found that DIRTY apparently means that it's
+> ready to be written to?

DIRTY means that device is open for writting and when a crash/power
failure occur, it will be synchronized on next boot.

+> Further search revealed that a 'gmirror status' should return something
+> like "degraded" if a device has failed.  I'm running 5.3 and am not
+> seeing the 'status' command for gmirror so I'm supposing I'll need to
+> upgrade.

The 'status' subcommand was introduce in 6.x.

+> Where can I find more detailed information about what the output of
+> 'gmirror list' means?  Has anyone come up with a better way then
+> grepping 'gmirror status' output for 'degraded'?

Grepping 'gmirror status' should be enough.
I'm wodering about a way to report failures from GEOM classes to
userland, but haven't had time to work on this yet.

--=20
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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