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Re: XFS on large block device problem

To: Frank Hellmann <frank@xxxxxxxxxxxxx>
Subject: Re: XFS on large block device problem
From: Eric Sandeen <sandeen@xxxxxxx>
Date: Fri, 27 Feb 2004 09:11:48 -0600 (CST)
Cc: XFS List <linux-xfs@xxxxxxxxxxx>
In-reply-to: <403F1F47.7040003@xxxxxxxxxxxxx>
Sender: linux-xfs-bounce@xxxxxxxxxxx
Frank - I'm able to reproduce this using loopback devices
as well, so you're not alone.  We'll talk to Neil Brown
about this, see if he knows about the problem.

-Eric

On Fri, 27 Feb 2004, Frank Hellmann wrote:

> Sure.
> 
> I did a clean run of the mkfs.xfs and two runs of xfs_repair.
> 
> It seems that the xfs_repair doesn't like the filesystem that much.
> 
> I attached the output and strace.
> 
> 
> I was wondering if using the other LVM methods would help here? I will 
> give the dm stuff a try and let you know, if it's just dependend on md.
> 
>       Cheers,
>               Frank...
> 
> > 
> > -Eric
> > 
> > On Thu, 2004-02-26 at 11:58, Frank Hellmann wrote:
> > 
> >>Hi!
> >>
> >>I just upgraded one of our linux boxes (Redhat 9 + usual 2.6 and glibc 
> >>patches) to kernel 2.6.3 and wanted to try out the large block device 
> >>support. First attemp, beware... :-)
> >>
> >>I setup a md0 device consisting of four ~1.5TB large devices with mkraid 
> >>/dev/md0 and a simple /etc/raidtab.
> >>
> >>I had some issues makeing the filesystem on /dev/md0. mkfs.xfs 
> >>complained about a non-clean md0 device and would not let me do anything 
> >>with it.
> >>
> >>Upgrading to xfs-progs 2.6.3 and mdadm 1.5 tools didn't change that.
> >>
> >>First doing an mkfs.ext3, mounting and unmounting the device seems to 
> >>cure that. At least after that I could mkfs.xfs it.
> >>
> >>Unfortunatly restoring (tar not xfsrestore) some demo data back onto the 
> >>drive I was getting a lot of xfs/kernel messages into the logfile. The 
> >>tar process stopped with errors after about 200M of restore and the last 
> >>files got corrupted. pdflush has high activity (~95%).
> >>
> >>xfs_repair reports beside a lot of other problems a couple of:
> >>
> >>primary/secondary superblock XX conflict - AG superblock geometry info
> >>conflicts with filesystem geometry
> >>
> >>which really makes me wonder, whats going on... See the attached files 
> >>for further info. Unfortunatly I currently don't have any debugging 
> >>tools on that machine...
> >>
> >>Everything is peachy (with LBD), if I stay below the usual 2TB limits 
> >>with the 2.6.3 kernel.
> >>
> >>Am I missing anything for XFS LBD support? Any ideas?
> >>
> >>
> >>            Cheers,
> >>                    Frank...
> 
> -- 
> --------------------------------------------------------------------------
> Frank Hellmann          Optical Art GmbH           Waterloohain 7a
> Digital Cinema          http://www.opticalart.de   22769 Hamburg
> frank@xxxxxxxxxxxxx     Tel: ++49 40 5111051       Fax: ++49 40 43169199
> 


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