Re: XFS: file system too large to be mounted on this system. 2.6.30.1

[Krzysztof Adamski <k@adamski.org>]

On Wed, 2009-07-22 at 23:19 -0500, Eric Sandeen wrote:
> Krzysztof Adamski wrote:
> > I got "XFS: file system too large to be mounted on this system." when
> > mounting my not to large file system.
> > 
> > I'm running Debian lenny with a self compiled kernel, 32 bit userland
> > distribution.
> > 
> > I have both 32 and 64 bit kernels of the 2.6.30.1 installed. I was
> > running the 64bit kernel for a while, I needed to switch to the 32 bit
> > version to run VBox. After reboot to 32bit kernel, one filesystem would
> > not mount. The xfs_repair did not find any good superblocks.
> > Fortunately booting the 64bit kernel allowed mounting of this
> > filesystem.
> > This is a df while running 64bit kernel:
> > /dev/mapper/big--raid-file--store
> >                xfs   2558652416 2540114040  18538376 100% /file-store
> > /dev/sda1      xfs   195263012 194723636    539376 100% /disks/a1
> > 
> > The interesting part is that /disks/a1 did not have problem with
> > mounting on the 32bit kernel, just the /file-store.
> 
> 
> Do you have CONFIG_LBD (or maye now CONFIG_LBDAF) set on the newer
> 32-bit kernel?  You'll need that.

Yes, this was it, the CONFIG_LBD got unset when I used the .config file
to compile on a system that was running a 64 bit kernel. Now everything
is back to normal, thanks.

> 
> If you do ....
> 
> file-store is about 2T?  What is the filesystem block size?  (xfs_info
> on the mountpoint would tell you)

For reference:
# xfs_info /file-store
meta-data=/dev/mapper/big--raid-file--store isize=256    agcount=32,
agsize=19990496 blks
         =                       sectsz=512   attr=0
data     =                       bsize=4096   blocks=639695872,
imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096  
log      =internal               bsize=4096   blocks=32768, version=1
         =                       sectsz=512   sunit=0 blks, lazy-count=0
realtime =none                   extsz=65536  blocks=0, rtextents=0

> 
> The test is looking at whether the nr of filesystem blocks overflows
> based on CONFIG_LBD or not...
> 
> and the function hasn't changed since 2007.... hrm.
> 
> I'll put my money on CONFIG_LBDAF.
> 
> -Eric
> 
> > When running 2.6.28.4 32bit kernel I have no problem with mounting this
> > filesystem. So something broke between 2.6.28.4 and 2.6.30.1
> > 
> > I can provide any other info.
> > 
> > K
> > 
> > 
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> 
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