Date: Sun, 10 Nov 2002 02:33:55 -0700 (MST) From: Nick Rogness <nick@rogness.net> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: Larry Sica <lomifeh@earthlink.net>, <freebsd-hackers@FreeBSD.ORG> Subject: Re: Filesystem corruption Message-ID: <20021110022411.N75268-100000@skywalker.rogness.net> In-Reply-To: <45812.1036861207@critter.freebsd.dk>
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On Sat, 9 Nov 2002, Poul-Henning Kamp wrote: > In message <FFCEB30D-F403-11D6-BCF2-000393A335A2@earthlink.net>, Larry Sica wri > tes: > >-----BEGIN PGP SIGNED MESSAGE----- > >Hash: SHA1 > > > >Not sure if hackers is the correct place to ask about this but... > > > >On Friday, November 8, 2002, at 06:28 PM, Nick Rogness wrote: > > > >> > >> We have a server that is doing some wierd things. /var/mail filesystem > >> (/dev/idad2s1e) is reporting errors during certain tasks (like dump). > >> It does fsck clean umounted. I have yet to see this type of error and > >> can't tell whether this is a bug or a hardware problem: > >> > >> Nov 8 15:41:20 pop1 /kernel: dscheck(#idad/0x20014): negative b_blkno > >> -791620152 > >> Nov 8 15:41:20 pop1 /kernel: dscheck(#idad/0x20014): negative b_blkno > > > >I've seen mention of this before, not sure what the fix was. I heard > >about this a few years ago on some quantam drives, the guy updated his > >firmware and it went away iirc. Does it do this only when you dump or > >under other circumstances? If other circumstances, which ones? > > 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)? umounting a live filesystem to back it up is not a solution. What should I be using to backup a live filesystem? Nick Rogness <nick@rogness.net> - "Wouldn't it be great if we could answer people with a kick to the crotch?" -maddox@xmission.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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