Manual Pages for UNIX Operating System command usage for man fsck_pcfs

System Administration Commands                      fsck_pcfs(1M)



NAME
     fsck_pcfs - file system consistency  check  and  interactive
     repair

SYNOPSIS
     fsck -F pcfs [generic_options] special


     fsck -F pcfs [generic_options] [-o specific_options] special


DESCRIPTION
     The fsck utility audits  and  interactively  repairs  incon-
     sistent  conditions  on file systems. special represents the
     character special device on which the file  system  resides,
     for  example  /dev/rdiskette.  The character special device,
     not the block special device, should be used.


     In  the  case  of  correcting  serious  inconsistencies,  by
     default,  fsck  asks for confirmation before making a repair
     and waits for the operator to respond either yes or  no.  If
     the operator does not have write permission on the file sys-
     tem, fsck defaults to a  -n  (no  corrections)  action.  See
     fsck(1M).


     Repairing some file system  inconsistencies  may  result  in
     loss  of  data.  The amount and severity of data loss may be
     determined from the diagnostic output.


     When executed with  the  verify  option  (-o  v),  fsck_pcfs
     automatically  scans  the  entire file system to verify that
     all of its allocation units are accessible. If it finds  any
     units  inaccessible,  it  updates  the file allocation table
     (FAT) appropriately. It also updates any effected  directory
     entries  to  reflect  the  problem.  This  directory  update
     includes truncating the file at the point in its  allocation
     chain  where  the  file  data  is  no longer accessible. Any
     remaining accessible allocation units become orphaned.


     Orphaned chains of accessible allocation units are, with the
     operator's  concurrence, linked back into the file system as
     files in the root directory. These files are assigned  names
     of  the  form  fileNNNN.chk,  where the Ns are digits in the
     integral range from 0 through 9.


     After successfully scanning and correcting any errors in the
     file  system,  fsck  displays a summary of information about



SunOS 5.11          Last change: 28 Jan 2000                    1






System Administration Commands                      fsck_pcfs(1M)



     the file system. This summary includes the size of the  file
     system in bytes, the number of bytes used in directories and
     individual files, and the  number  of  available  allocation
     units remaining in the file system.

OPTIONS
     generic_options        The  following  generic  options  are
                            supported:

                            -m         Check but do  not  repair.
                                       This  option  checks  that
                                       the file system  is  suit-
                                       able for mounting, return-
                                       ing the  appropriate  exit
                                       status. If the file system
                                       is  ready  for   mounting,
                                       fsck   displays  a message
                                       such as:

                                         pcfs fsck: sanity check:
                                         /dev/rdiskette okay




                            -n | -N     Assume a no  response  to
                                       all   questions  asked  by
                                       fsck; do not open the file
                                       system for writing.


                            -V         Echo the expanded  command
                                       line,  but  do not execute
                                       the command.  This  option
                                       may  be used to verify and
                                       to  validate  the  command
                                       line.


                            -y | -Y    Assume a yes  response  to
                                       all   questions  asked  by
                                       fsck.



     -o specific_options    Specify  pcfs  file  system  specific
                            options in a comma-separated list, in
                            any combination, with no  intervening
                            spaces.

                            v    Verify all allocation units  are
                                 accessible  prior  to correcting



SunOS 5.11          Last change: 28 Jan 2000                    2






System Administration Commands                      fsck_pcfs(1M)



                                 inconsistencies in the metadata.


                            p    Check and fix  the  file  system
                                 non-interactively (preen).  Exit
                                 immediately if there is a  prob-
                                 lem requiring intervention.


                            w    Check  writable   file   systems
                                 only.



FILES
     special    The device which contains the  pcfs.  The  device
                name    for    a   diskette   is   specified   as
                /dev/rdiskette0 for the first diskette drive,  or
                /dev/rdiskette1  for  a  second diskette drive. A
                hard disk device or high-capacity removable  dev-
                ice name much be qualified with a suffix to indi-
                cate the proper FDISK partition.

                For example, in the  names:  /dev/rdsk/c0t0d0p0:c
                and /dev/rdsk/c0t4d0s2:c, the :c suffix indicates
                the first partition  on  the  disk  contains  the
                pcfs.


ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ________________________________________________________________
    |       ATTRIBUTE TYPE        |         ATTRIBUTE VALUE         |
    |_____________________________|_________________________________|
    | Availability                | system/extended-system-utilities|
    |_____________________________|_________________________________|
    | Interface Stability         | Committed                       |
    |_____________________________|_________________________________|


SEE ALSO
     fsck(1M),  fstyp(1M),  fdisk(1M),  mkfs(1M),  mkfs_pcfs(1M),
     mountall(1M), attributes(5), pcfs(7FS),

WARNINGS
     The operating system buffers file system data. Running  fsck
     on  a  mounted  file system can cause the operating system's
     buffers to become out of date with respect to the disk.  For



SunOS 5.11          Last change: 28 Jan 2000                    3






System Administration Commands                      fsck_pcfs(1M)



     this  reason,  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
     after fsck is run. Quite often, however, this is not  suffi-
     cient. A panic will probably occur if running fsck on a file
     system modifies the file system.

















































SunOS 5.11          Last change: 28 Jan 2000                    4