fsck_pcfs(1M)						  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 inconsistent 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 system, 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 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 suitable 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  spa-
			       ces.

			       v	Verify all allocation units are accessible prior to correcting inconsistencies in the metadata.

			       p	Check and fix the file system non-interactively (preen).  Exit immediately if there is a problem 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
			       device name much be qualified with a suffix to indicate the proper FDISK partition.

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

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |ATTRIBUTE TYPE		     |ATTRIBUTE VALUE		   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWesu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Stable			   |
       +-----------------------------+-----------------------------+

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 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 suf-
       ficient. A panic will probably occur if running fsck on a file system modifies the file system.

SunOS 5.10							    28 Jan 2000 						     fsck_pcfs(1M)