fsck(1M)                         UNIX System V                         fsck(1M)


NAME
      fsck - check and repair file systems

SYNOPSIS
      fsck [-F FSType] [-V] [-m] [special ...]
      fsck [-F FSType] [-V] [current_options] [-o specific_options] [special
      ...]

DESCRIPTION
      fsck audits and interactively repairs inconsistent conditions for file
      systems.  If the file system is inconsistent the user is prompted for
      concurrence before each correction is attempted.  It should be noted that
      some corrective actions will result in some loss of data.  The amount and
      severity of data loss may be determined from the diagnostic output.  The
      default action for each correction is to wait for the user to respond yes
      or no.  If the user does not have write permission fsck defaults to a no
      action.

      The file system should be unmounted when fsck is used.  If this is not
      possible, care should be taken that the system is quiescent and that it
      is rebooted immediately afterwards if the file system is a critical one,
      for example root.

      current_options are options supported by the s5-specific module of fsck.
      Other FSTypes do not necessarily support these options.  specific_options
      indicate suboptions specified in a comma-separated list of suboptions
      and/or keyword-attribute pairs for interpretation by the FSType-specific
      module of the command.

      special represents a block or character special device (e.g.,
      /dev/rdsk/c1d0s8).  It is preferable that a character special device be
      used.  fsck will not work on a block device if it is mounted.  If special
      is not supplied, fsck looks through /etc/vfstab and executes fsck for all
      character specials in the fsckdev field of /etc/vfstab for which there is
      a numeric entry in the fsckpass field.

      The options are:

      -F        Specify the FSType on which to operate.  The FSType should
                either be specified here or be determinable from /etc/vfstab by
                matching the special with an entry in the table.  If FSType is
                not specified, or if FSType does not exist in /etc/vfstab then
                FSType defaults to s5.

      -V        Echo the complete command line, but do not execute the command.
                The command line is generated by using the options and
                arguments provided by the user and adding to them information
                derived from /etc/vfstab.  This option should be used to verify
                and validate the command line.





10/89                                                                    Page 1

fsck(1M)                         UNIX System V                         fsck(1M)


      -m        Check but don't repair.  This option checks that the file
                system is suitable for mounting.

      -o        Specify FSType-specific options.

NOTE
      This command may not be supported for all FSTypes.

FILES
      /etc/vfstab       list of default parameters for each file system

SEE ALSO
      checkfsys(1M), mkfs(1M), vfstab(4).
      Manual pages for the FSType-specific modules of fsck.








































Page 2                                                                    10/89