icheck(1m) [v7 man page]

ICHECK(1M)																ICHECK(1M)

NAME

       icheck - file system storage consistency check

SYNOPSIS

       icheck [ -s ]  [ -b numbers ] [ filesystem ]

DESCRIPTION

       Icheck examines a file system, builds a bit map of used blocks, and compares this bit map against the free list maintained on the file sys-
       tem.  If the file system is not specified, a set of default file systems is checked.  The normal output of icheck includes a report of

	      The total number of files and the numbers of regular, directory, block special and character special files.

	      The total number of blocks in use and the numbers of single-, double-, and triple-indirect blocks and directory blocks.

	      The number of free blocks.

	      The number of blocks missing; i.e. not in any file nor in the free list.

       The -s option causes icheck to ignore the actual free list and reconstruct a new one by rewriting the super-block of the file system.   The
       file  system should be dismounted while this is done; if this is not possible (for example if the root file system has to be salvaged) care
       should be taken that the system is quiescent and that it is rebooted immediately afterwards so that the old, bad in-core copy of the super-
       block  will  not continue to be used.  Notice also that the words in the super-block which indicate the size of the free list and of the i-
       list are believed.  If the super-block has been curdled these words will have to be patched.   The  -s  option  causes  the  normal  output
       reports to be suppressed.

       Following the -b option is a list of block numbers; whenever any of the named blocks turns up in a file, a diagnostic is produced.

       Icheck is faster if the raw version of the special file is used, since it reads the i-list many blocks at a time.

FILES

       Default file systems vary with installation.

SEE ALSO

       dcheck(1), ncheck(1), filsys(5), clri(1)

DIAGNOSTICS

       For  duplicate  blocks  and  bad  blocks (which lie outside the file system) icheck announces the difficulty, the i-number, and the kind of
       block involved.	If a read error is encountered, the block number of the bad block is printed and icheck considers it to contain  0.   `Bad
       freeblock'  means  that	a block number outside the available space was encountered in the free list.  `n dups in free' means that n blocks
       were found in the free list which duplicate blocks either in some file or in the earlier part of the free list.

BUGS

       Since icheck is inherently two-pass in nature, extraneous diagnostics may be produced if applied to active file systems.
       It believes even preposterous super-blocks and consequently can get core images.

																	ICHECK(1M)

df_hfs(1M)																df_hfs(1M)

NAME

       df_hfs: df - report number of free CDFS, HFS, or NFS file system disk blocks

SYNOPSIS

       FStype] specific_options] [special|directory]...

DESCRIPTION

       The  command  displays  the  number  of free 512-byte blocks and free inodes available for file systems by examining the counts kept in the
       superblock or superblocks.  If a special or a directory is not specified, the free space on all mounted file systems is displayed.  If  the
       arguments  to are path names, reports on the file systems containing the named files.  If the argument to is a special of an unmounted file
       system, the free space in the unmounted file system is displayed.

   Options
       recognizes the following options:

	      Report only the number of kilobytes (KB) free.

	      Report the total number of blocks allocated for swapping to the file system
			     as well as the number of blocks free for swapping to the file system.  This option is supported on HFS  file  systems
			     only.

	      Report the number of files free.

	      Report only the actual count of the blocks in the free list
			     (free inodes are not reported).  When this option is specified, reports on raw devices.

	      Report only on the
			     FStype  file  system  type  (see fstyp(1M)).  For the purposes of this manual entry, FStype can be one of and for the
			     CDFS, HFS, and NFS file systems, respectively.

	      Report the entire structure described in
			     statvfs(2).

	      Report the total number of inodes,
			     the number of free inodes, number of used inodes, and the percentage of inodes in use.

	      Report the allocation in kilobytes (KB).

	      Report on local file systems only.

	      Report the file system name.
			     If used with no other options, display a list of mounted file system types.

	      Specify options specific to the HFS file system type.
			     specific_options is a comma-separated list of suboptions.

			     The available suboption is:

				  Report the number of used and free inodes.

	      Report the total allocated block figures and the number of free blocks.

	      Report the percentage of blocks used,
			     the number of blocks used, and the number of blocks free.	This option cannot be used with other options.

	      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  This
			     option allows the user to verify the command line.

       When  is used on an HFS file system, the file space reported is the space available to the ordinary user, and does not include the reserved
       file space specified by

       Unreported reserved blocks are available only to users who have appropriate privileges.	See tunefs(1M) for information about

       When is used on NFS file systems, the number of inodes is displayed as -1 .  This is due to superuser access restrictions over NFS.

EXAMPLES

       Report the number of free disk blocks for all mounted file systems:

       Report the number of free disk blocks for all mounted HFS file systems:

       Report the number of free files for all mounted NFS file systems:

       Report the total allocated block figures and the number of free blocks, for all mounted file systems:

       Report the total allocated block figures and the number of free blocks, for the file system mounted as /usr:

WARNINGS

       does not account for:

	      o  Disk space reserved for swap space,
	      o  Space used for the HFS boot block (8K bytes, 1 per file system),
	      o  HFS superblocks (8K bytes each, 1 per disk cylinder),
	      o  HFS cylinder group blocks (1K-8K bytes each, 1 per cylinder group),
	      o  Inodes (currently 128 bytes reserved for each inode).

       Non-HFS file systems may have other items that this command does not account for.

       The option, from prior releases, has been replaced by the option.

FILES

       File system devices.
       Static information about the file systems
       Mounted file system table

SEE ALSO

       du(1), df(1M), fsck(1M), fstab(4), fstyp(1M), statvfs(2), mnttab(4).

STANDARDS CONFORMANCE

																	df_hfs(1M)