Linux / Unix Command: fsck.jfs

Command Library

NAME

SYNOPSIS

DESCRIPTION

fsck.jfs is used to replay the JFS transaction log, check a JFS formatted device for errors, and fix any errors found.

device is the special file name corresponding to the actual device to be checked (e.g. /dev/hdb1).

fsck.jfs must be run as root.

WARNING

fsck.jfs should only be used to check an unmounted file system or a file system that is mounted READ ONLY. Using fsck.jfs to check a file system mounted other than READ ONLY could seriously damage the file system!

OPTIONS

-a

Autocheck mode - Replay the transaction log. Do not continue fsck processing unless the aggregate state is dirty or the log replay failed. Functionally equivalent to -p. Autocheck mode is typically the default mode used when fsck.jfs is called at boot time.

-f

Replay the transaction log and force checking even if the file system appears clean. Repair all problems automatically.

-n

Open the file system read only. Do not replay the transaction log. Report errors, but do not repair them.

-o

Omit the replay of the transaction log. This option should not be used unless as a last resort (i.e. the log has been severely corrupted and replaying it causes further problems).

-p

Automatically repair ("preen") the file system. Replay the transaction log. Do not continue fsck processing unless the aggregate state is dirty or the log replay failed. Functionally equivalent to -a.

-v

Verbose messaging - print details and debug statements to stdout.

-V

Print version information and exit (regardless of any other chosen options).

EXAMPLES

Check the 3rd partition on the 2nd hard disk, print extended information to stdout, replay the transaction log, force complete fsck.jfs checking, and give permission to repair all errors:

fsck.jfs -v -f /dev/hdb3

Check the 5th partition on the 1st hard disk, and report, but do not repair, any errors:

fsck.jfs -n /dev/hda5

EXIT CODE

 0

No errors

 1

File system errors corrected and/or transaction log replayed successfully

 2

File system errors corrected, system should be rebooted if file system was mounted

 4

File system errors left uncorrected

 8

Operational error

 16

Usage or syntax error

 128

Shared library error

REPORTING BUGS

If you find a bug in JFS or fsck.jfs, please report it via the bug tracking system ("Report Bugs" section) of the JFS project web site:

http://oss.software.ibm.com/jfs

Please send as much pertinent information as possible, including the complete output of running fsck.jfs with the -v option on the JFS device.

SEE ALSO

Important: Use the man command (% man) to see how a command is used on your particular computer.

>> Linux/Unix Command Library

>> Shell Command Library