From owner-freebsd-hackers  Sun Nov 10 10:33:29 2002
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To: Nick Rogness <nick@rogness.net>
Cc: Larry Sica <lomifeh@earthlink.net>, freebsd-hackers@FreeBSD.ORG
Subject: Re: Filesystem corruption 
In-Reply-To: Your message of "Sun, 10 Nov 2002 02:33:55 MST."
             <20021110022411.N75268-100000@skywalker.rogness.net> 
Date: Sun, 10 Nov 2002 19:33:11 +0100
Message-ID: <24699.1036953191@critter.freebsd.dk>
From: Poul-Henning Kamp <phk@critter.freebsd.dk>
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In message <20021110022411.N75268-100000@skywalker.rogness.net>, Nick Rogness w
rites:

>> The fix is to not run dump(8) on a live filesystem.  You should
>> either use a snapshot or umount the device.
>
>	I've been running dump for years on live filesystems with FreeBSD
>	and never had a problem.  I was not aware of any snapshot feature
>	available for 4.X-STABLE (only 5.0)?

It works most of the time, but not always.  There is no way for dump(8)
to realize what has changed under its feet and therefore it sometimes
ends up with a bunch of negative blocknumbers.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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