6.1 HP IBRIX X9000 Network Storage System CLI Reference (TA768-96057, June 2012)

ibrix_fsck
Analyzes inconsistencies in a file system.
Description
CAUTION: Do not run ibrix_fsck in corrective mode without the direct guidance of HP Support.
If run improperly, the command can cause data loss and file system damage.
CAUTION: Do not run e2fsck or any other off-the-shelf fsck program on any part of a file
system. Doing so will damage the file system.
The ibrix_fsck command command can detect and repair file system inconsistencies. File system
inconsistencies can occur for many reasons, including hardware failure, power failure, switching
off the system without proper shutdown, and failed migration.
The command runs in four phases and has two running modes, analytical and corrective. You must
run the phases in order and you must run all of them:
• Phase 0 checks host connectivity and the consistency of the segment byte blocks and repairs
them in corrective mode.
• Phase 1 checks segments and repairs them in corrective mode. Results are stored locally.
• Phase 2 checks the file system and repairs it in corrective mode. Results are stored locally.
• Phase 3 moves files from lost+found on each segment to the global lost+found directory
on the root segment of the file system.
If a file system shows evidence of inconsistencies, contact HP Support. A representative will ask
you to run ibrix_fsck in analytical mode and, based on the output, will recommend a course
of action and assist in running the command in corrective mode. HP strongly recommends that you
use corrective mode only with the direct guidance of HP Support. Corrective mode is complex and
difficult to run safely. Using it improperly can damage both data and the file system. Analytical
mode is completely safe, by contrast.
NOTE: During an ibrix_fsck run, an INFSCK flag is set on the file system to protect it. If an
error occurs during the run, you must explicitly clear the INFSCK flag with ibrix_fsck -f
FSNAME -C or you will be unable to mount the file system.
Observe the following requirements when executing ibrix_fsck:
• Unmount the file system for phases 0 and 1 and mount the file system for phases 2 and 3.
• Turn off automated failover by executing ibrix_host -m -U -h SERVERNAME.
• Unmount all NFS clients and stop NFS on the servers.
Synopsis
Clear the INFSCK flag for the specified file system:
ibrix_fsck -f FSNAME -C
Runs phase 0 in analytic mode:
ibrix_fsck -p 0 -f FSNAME [-s LVNAME] [-c]
The command can be run on the specified file system or optionally only on the specified segment
LVNAME.
Run phase 1 in analytic mode:
ibrix_fsck -p 1 -f FSNAME [-s LVNAME] [-c] [-B BLOCKSIZE] [-b
ALTSUPERBLOCK]
ibrix_fsck 65