Lustre discuss - Sep 2006 - tune2fs has problems with large partitions (>2TB).

This is not lustre specific, but I tried to follow the recipe in the 
knowlegdebase for freeing the reserved blocks on the filesystem.  But tune2fs 
has problems with my 3TB partitions:

[root@lustre-11-1 ~]# tune2fs -m 0 /dev/sdb1
tune2fs 1.39 (29-May-2006)
tune2fs: Filesystem has unsupported feature(s) while trying to open /dev/sdb1
Couldn''t find valid filesystem superblock.
[root@lustre-11-1 ~]# parted /dev/sdb p
Disk geometry for /dev/sdb: 0.000-2861022.949 megabytes
Disk label type: gpt
Minor    Start       End     Filesystem  Name                  Flags
1          0.017 2861022.933  ext3
Information: Don''t forget to update /etc/fstab, if necessary.

It works if the partitions is smaller than 2TB.

Do anyone know of a workaround or should I bite the bullet and split the 
partitions into 1.5TB chunks and rather run twice as many osts?

I tried the latest e2fsprogs, 1.39, but the problem persists.

r.

-- 

  The Computer Center, University of Troms?, N-9037 TROMS?, Norway.
	      phone:+47 77 64 41 07, fax:+47 77 64 41 00
     Roy Dragseth, High Performance Computing System Administrator
	 Direct call: +47 77 64 62 56. email: royd@cc.uit.no

On Sep 06, 2006  20:47 +0200, Roy Dragseth wrote:
> But tune2fs has problems with my 3TB partitions:
> 
> [root@lustre-11-1 ~]# tune2fs -m 0 /dev/sdb1
> tune2fs 1.39 (29-May-2006)
> tune2fs: Filesystem has unsupported feature(s) while trying to open
/dev/sdb1
> Couldn''t find valid filesystem superblock.
> [root@lustre-11-1 ~]# parted /dev/sdb p
> Disk geometry for /dev/sdb: 0.000-2861022.949 megabytes
> Disk label type: gpt
> Minor    Start       End     Filesystem  Name                  Flags
> 1          0.017 2861022.933  ext3
> Information: Don''t forget to update /etc/fstab, if necessary.
> 
> It works if the partitions is smaller than 2TB.
> 
> Do anyone know of a workaround or should I bite the bullet and split the 
> partitions into 1.5TB chunks and rather run twice as many osts?
> 
> I tried the latest e2fsprogs, 1.39, but the problem persists.
Please use the CFS e2fsprogs-1.39 at ftp.lustre.org/pub/lustre/other/e2fsprogs
because of the "extents" feature.  This will be part of the upstream
code
for e2fsprogs 1.40.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

You are absolutely right, it had nothing to do with the size of the 
partitions.

Thanks,
r.


-- 

  The Computer Center, University of Troms?, N-9037 TROMS? Norway.
	      phone:+47 77 64 41 07, fax:+47 77 64 41 00
     Roy Dragseth, High Performance Computing System Administrator
	 Direct call: +47 77 64 62 56. email: royd@cc.uit.no