CentOS - Dec 2006 - large disk volumes with 64bit kernel

I installed 4.4 on a machine that's got two RAID volumes, one of 
which is a bit over 2.1 terabytes. The installer had no problem. 
However, fsck does. Commenting out the volume in /etc/fstab, the 
machine will boot. The machine will mount the volume and use it. 
Everything seems fine except fsck, which seems, well, fscked.

When trying to run fsck, it says:

# fsck /dev/sdb1
fsck 1.35 (28-Feb-2004)
e2fsck 1.35 (28-Feb-2004)
The filesystem size (according to the superblock) is 549346683 blocks
The physical size of the device is 12475771 blocks
Either the superblock or the partition table is likely to be corrupt!
Abort<y>? yes

Is there some way to build single volumes larger than 2TB? It should 
not be a problem with a 64 bit OS (Windows managed to do it on this 
hardware before I switched it over to Linux). Is there some tuning I 
need? Any pointers to documents or other useful references would be 
appreciated. Thanks for any/all help.

Dan
-- 
-----------------------------------------------------------------
Daniel Senie                                        dts at senie.com
Amaranth Networks Inc.                    http://www.amaranth.com

   "George Orwell was only off by 20 years. Had he titled his book
    2004 instead of 1984, he'd have been hailed as prescient.
    War is Peace. Freedom is Slavery. Ignorance is Strength." -dts

> # fsck /dev/sdb1
> fsck 1.35 (28-Feb-2004)
> e2fsck 1.35 (28-Feb-2004)
> The filesystem size (according to the superblock) is 549346683 blocks
> The physical size of the device is 12475771 blocks
> Either the superblock or the partition table is likely to be corrupt!
> Abort<y>? yes
> 
> Is there some way to build single volumes larger than 2TB? It should not 
> be a problem with a 64 bit OS (Windows managed to do it on this hardware 
> before I switched it over to Linux). Is there some tuning I need? Any 
> pointers to documents or other useful references would be appreciated. 
> Thanks for any/all help.
> 
Are you using a GPT partition for that 2.x TB filesystem?

http://www.wlug.org.nz/GPT

On Tuesday 12 December 2006 03:01, Daniel Senie wrote:
> The filesystem size (according to the superblock) is 549346683 blocks
> The physical size of the device is 12475771 blocks
Your partitioning is messed up, most likely you have a >2TiB partition on a 
dos partition table (which simply won't work). You have two options for 
devices larger than 2TiB, 1) use gtp as the partition table type (create with 
parted) 2) create a lvm pv directly on the device and skip the partition 
table all together.

Also, why the installer happily creates these filesystems like this is beyond 
me...
> Either the superblock or the partition table is likely to be corrupt!
> Abort<y>? yes
This fs is most likely lost.
> Is there some way to build single volumes larger than 2TB? It should
> not be a problem with a 64 bit OS
It's not even a problem on 32-bit Centos, just has to be done "the
right way".

/Peter
> (Windows managed to do it on this 
> hardware before I switched it over to Linux). Is there some tuning I
> need? Any pointers to documents or other useful references would be
> appreciated. Thanks for any/all help.
>
> Dan
-- 
------------------------------------------------------------
  Peter Kjellstr?m               | E-mail: cap at nsc.liu.se
  National Supercomputer Centre  |
  Sweden                         | http://www.nsc.liu.se
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