[Lustre-discuss] Lustre 1.8.4 - Local mount of ost for backup purposes, fs type ldiskfs or ext4?

[Jeff Johnson]

Greetings,

I am doing a local mount of a >8TB ost device in a Lustre 1.8.4 
installation. The ost was built with a backfstype of ldiskfs.

When attempting the local mount:

     mount -t ldiskfs /dev/sdc /mnt/save/ost

I get:

     mount: wrong fs type, bad option, bad superblock on /dev/sdt,
                 missing codepage or other error

I am able to mount the same block device as ext4, just not as ldiskfs. I 
need to be able to mount as ldiskfs to get access to the extended 
attributes and back them up. Is this still the case with the ext4 
extensions for Lustre 1.8.4? I am able to mount read-only as ext4 but 
any attempt at reading the extended attributes with getfattr fails.

Thanks,

--Jeff

-- 
------------------------------
Jeff Johnson
Manager
Aeon Computing

jeff.johnson at aeoncomputing.com
www.aeoncomputing.com
t: 858-412-3810 x101   f: 858-412-3845
m: 619-204-9061

4905 Morena Boulevard, Suite 1313 - San Diego, CA 92117