ls -l (without showing total blocks) Post: 302397793

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LEARN ABOUT V7

icheck

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)