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HP-UX Reference > F


HP-UX 11i Version 3: February 2007

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fsck — file system consistency check and interactive repair


/usr/sbin/fsck [-F FSType] [-m] [-s] [-V] [special ...]

/usr/sbin/fsck [-F FSType] [-o FSspecific-options] [-s] [-V] [special ...]


The fsck command audits and interactively repairs inconsistent conditions for HP-UX file systems on mass storage device files identified by special. If the file system is consistent, the number of files on that file system and the number of used and free blocks are reported. If the file system is inconsistent, fsck provides a mechanism to fix these inconsistencies, depending on which form of the fsck command is used.

special represents a special device (for example, /dev/rdisk/disk1_p2).


fsck recognizes the following options:

-F FStype

Specify the file system type on which to operate (see fstyp(1M) and fs_wrapper(5)). If this option is not included on the command line, then the file system type is determined from the file /etc/fstab by matching special with an entry in that file. If there is no entry in /etc/fstab, then the file system type is determined from the file /etc/default/fs.


Perform a sanity check only. fsck will return 0 if the file system is suitable for mounting. If the file system needs additional checking, the return code is 32. If the file system is mounted, the return code is 33. Error codes larger than 33 indicate that the file system is badly damaged.

-o FSspecific-options

Specify options specific to each file system type. FSspecific-options is a list of suboptions and/or keyword/attribute pairs intended for a file-system-specific version of the command. See the file-system-specific manual entries for a description of the specific_options supported, if any.


Safe performance mode. To improve performance, a system wide sync() will not be issued. This feature is underlying file system dependent.


Echo the completed command line, but perform no other action. The command line is generated by incorporating the user-specified options and other information derived from /etc/fstab. This option allows the user to verify the command line.


The following values are returned by the -m option to fsck:


Either no errors were detected or all errors were corrected.


The file system needs additional checking.


The file system is mounted.

Return values greater that 33 indicate that file system is badly corrupted. File system specific versions of fsck will have their own additional return values (see fsck_cachefs(1M), fsck_hfs(1M), or fsck_vxfs(1M)).


This command may not be supported for all file system types.

If this command returns the message "Can't send after socket shutdown", check with your system administrator to make sure the fsdaemon is running properly.



Specifies the default file system type


Default list of file systems to check


fsck: SVID3

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