HP StorageWorks Scalable File Share - Manual (Page 249)

Troubleshooting file systems 9–25
Note the following points:
• You must not run more than one file system repair session at any one time.
• The version of the MPI Lustre repair utility that is provided with HP SFS Version 2.2 is intended for use
only while the file system is stopped—that is, the file system is not being used to create, delete, or
modify any files contained within it.
• HP recommends that you only use the MPI Lustre repair utility if you suspect that a file system has
become catastrophically corrupted. Lustre has been designed to tolerate failures in the component file
systems, and is generally well equipped to recover and repair damage resulting from such failures
without any need for manual intervention. It is only when such automated recovery mechanisms are
unable to cope that you should use the MPI Lustre repair utility.
• The MPI Lustre repair utility may take a considerable time to run—this can range from a few minutes
to several hours. The length of time taken depends on the size of the file system, the number of files it
contains, and the number of services over which the files may be distributed.
The repair-lfsck script and the generated file system-specific shell scripts
The
repair-lfsck
script simplifies the task of repairing Lustre file systems. It generates file system-specific
shell scripts that can be run to repair individual file systems at any time, as necessary. The generated scripts
automatically perform the series of tasks involved in file system repair sessions, including launching the MPI
Lustre repair utility on all servers.
See Section 9.26.5.1 for detailed instructions on how to use the
repair-lfsck
script and the scripts it
generates.
Examining and repairing individual MDS or OST services
If you want to repair or examine an individual MDS or OST service, you can run the
e2fsck-lfsck
command manually. See Section 9.26.5.2 for more information.
9.26.5.1 Using the repair-lfsck script and the generated file system-specific shell scripts
The
repair-lfsck
script generates file system-specific shell scripts that can be run to repair individual file
systems at any time, as necessary. The syntax of the script is as follows:
repair-lfsck [-h] [-v] [-n] [-x] [-f filesystem_name]
Where:
-h
Optional. Displays the usage of the command.
-v
Optional. Specifies that verbose output is required from the generated
script. This is useful for debugging purposes.
-n
Optional. Specifies that the generated script will only report on the
file system and will not repair the file system. Using the
-n
option
also disables the launching of the
e2fsck-lfsck
command.
-x
Optional. Specifies that the
e2fsck-lfsck
command is not to be
launched. When this option is specified, the Lustre inconsistencies in
the file system can be repaired more quickly, but the underlying file
system will not be repaired.
-f filesystem_name
Optional. Specifies the file system for which a script is to be
generated. If you do not specify a file system, a script will be
generated for each file system.