HP StorageWorks Scalable File Share - Manual (Page 251)

Troubleshooting file systems 9–27
2. Stop the file system and ensure that the file system devices are not being used. Check the
/proc/
mounts
file and the
/proc/fs/lustre/obdfilter/mntdev
(or
/proc/fs/lustre/mds/
mntdev
) files to ensure that the file system devices are not mounted on any mount point.
3. Ensure that the administration server can connect to all of the other servers used by the file systems
using the
ssh
utility without a password.
4. Enter the name of the generated script at the prompt, as shown in the following example:
# do_lfsck-scratch.sh
When the repair process is complete, make sure that there are no stray mount points remaining mounted
before you start the file system.
If a
do-lfsck-filesystem_name
script fails for any reason, HP recommends that you contact your HP
Customer Support representative. Ensure that there are no stray processes or mounts left mounted. You can
see mounts, (with the name
/mnt/device.x
), in the
/proc/mounts
file on the servers. Note that these
mounts are not shown by the
mount
(8) command. Rebooting the servers will ensure that stray processes
and mounts are cleared.
9.26.5.2 Repairing or verifying individual MDS or OST services
If you want to repair or verify MDS or OST services themselves (rather than an entire file system), you can
run the
e2fsck-lfsck
command manually using the same arguments as would be used by the standard
e2fsck
program to repair a standard
ext3/ldiskfs
file system.
Note that if the device you want to examine or repair is a mirrored device, you must start the underlying
mirrored devices before you run the
e2fsck-lfsck
command.
Before you run the
e2fsck-lfsck
command manually, perform the following steps:
1. Identify the device that the
e2fsck-lfsck
command is to examine. The device names are made up
as follows:
/dev/hpls/devlun_numbera
where
lun_number
is the number of the LUN used by the service.
Use the
show filesystem filesystem_name
command to identify the LUN numbers for the
devices. In the following example, the file system name is
test
, the MDS device name is
/dev/
hpls/dev5a
, and the OST device names are
/dev/hpls/dev1a
and
/dev/hpls/dev2a
:
sfs> show filesystem test
Name: test
OSTs: ost[7-8]
State: started
Mountpoint: /mnt/test/
Stripe size: 4194304
Stripe count: 2
Interconnect: tcp elan
MDS mount options: acl,user_xattr
OST mount options: extents
Lustre timeout: 200
Quota options: quotaon=ug
MDS Information:
Name LUN Array Controller Files Used Service State Running on
----- --- ----- ---------- -------- ---- ------------- ----------
mds3 5 1 B 2.3M 20% running south2
OST Information:
Name LUN Array Controller Size(GB) Used Service State Running on
----- --- ----- ---------- -------- ---- ------------- ----------
ost7 1 1 A 290 30% running south3
ost8 2 1 A 290 31% running south4