Skip site navigation (1)Skip section navigation (2)
Date:      Wed, 08 Oct 2008 10:01:41 -0700
From:      "Kevin Oberman" <oberman@es.net>
To:        Jeremy Chadwick <koitsu@FreeBSD.org>
Cc:        freebsd-stable@freebsd.org, David Peall <david@esn.org.za>
Subject:   Re: Problem with dump stalling 
Message-ID:  <20081008170141.34C264500F@ptavv.es.net>
In-Reply-To: Your message of "Wed, 08 Oct 2008 01:54:12 PDT." <20081008085412.GA71654@icarus.home.lan> 

next in thread | previous in thread | raw e-mail | index | archive | help
--==_Exmh_1223485301_62215P
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

> Date: Wed, 8 Oct 2008 01:54:12 -0700
> From: Jeremy Chadwick <koitsu@FreeBSD.org>
> Sender: owner-freebsd-stable@freebsd.org
> 
> On Wed, Oct 08, 2008 at 10:29:00AM +0200, David Peall wrote:
> > Hi
> > 
> > If I have the wrong list please feel free to redirect me.
> > 
> > I'm running 7.0-RELEASE-p4 and trying to backup to an external USB
> > drive.
> > 
> > I'm using the following command
> > 
> > dump -a0Lf /backup/diskimages/root /dev/mfid0s1a
> > 
> > Where df:
> > 
> > Filesystem    1K-blocks     Used     Avail Capacity  Mounted on
> > /dev/mfid0s1a    507630   208436    258584    45%    /
> > /dev/da1s1d   709513458  9853800 642898582     2%    /backup
> > 
> > The following processes start 
> > 
> > 75399  p0  I+     0:00.04 dump -a0Lf /backup/diskimages/root /dev/mfid0s1a (dump)
> > 75402  p0  S+     0:00.71 dump: /dev/mfid0s1a: pass 4: 77.05% done, finished in 0:00 at Wed Oct  8 08:25:06 2008 (dump)
> > 75403  p0  S+     0:00.85 dump -a0Lf /backup/diskimages/root /dev/mfid0s1a (dump)
> > 75404  p0  S+     0:00.96 dump -a0Lf /backup/diskimages/root /dev/mfid0s1a (dump)
> > 75405  p0  S+     0:00.86 dump -a0Lf /backup/diskimages/root /dev/mfid0s1a (dump)
> > 
> > But it just stops at a random percentage,  the system continues to run
> > and the processes are killable?
> > 
> > Perhaps I'm using dump incorrectly if anyone could help would be greatly
> > appreciated.
> 
> This is a known problem with dump on UFS2 filesystems.  See
> "dump/restore" here:
> 
> http://wiki.freebsd.org/JeremyChadwick/Commonly_reported_issues
> 
> There is no fix, AFAIK.
> 
> My recommendation is to use something else.  I'm particularly fond of
> rsnapshot, but be aware that rsync will cause file atimes to be lost
> (on the source) when copying; this can impact classic UNIX mail
> spools (mbox), where people use clients like mutt/pine which utilise
> atimes to determine if there's new mail or not.

I had a system that was showing these exact symptoms David described. It
did this both with -L and without. I went for about 3 months without a
successful dump. I did at least two full system re-installs to no
avail. Then, about 3 weeks ago, when I was about to start some serious
debugging, it started working again. Nothing was touched between the
last failure and the first success. I'm completely baffled!
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751

--==_Exmh_1223485301_62215P
Content-Type: application/pgp-signature

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.9 (FreeBSD)
Comment: Exmh version 2.5 06/03/2002

iD8DBQFI7Od1kn3rs5h7N1ERAhe5AJ9uVAWh6UCpmCgpu8Gp5wVrLd34xQCdG3GJ
4hIdoNMiARboTVgHAICTLQk=
=Xiu5
-----END PGP SIGNATURE-----

--==_Exmh_1223485301_62215P--



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20081008170141.34C264500F>