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icheck(8)							    icheck(8)



NAME

  icheck - File	system storage consistency check

SYNOPSIS

  /usr/sbin/icheck [-b numbers]	[file system]

DESCRIPTION

  The icheck command is	obsoleted for normal consistency checking by fsck.

  The icheck command examines a	file system, builds a bit map of used blocks,
  and compares this bit	map against the	free map 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	following
  items:

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

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

    +  The number of free blocks.

    +  The number of blocks missing; that is, not in any file or in any	free
       map.

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

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

NOTES

  Since	icheck is inherently two-pass in nature, extraneous diagnostics	may
  be produced if applied to active file	systems. It believes even prepos-
  terous super-blocks and consequently causes a	core dump.

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	zero.







FILES

  /usr/sbin/icheck
      Specifies	the command path.


SEE ALSO

  Commands: clri(8), fsck(8), ncheck(8)