.\" Copyright (c) 1988 The Regents of the University of California.
.\" %sccs.include.proprietary.roff%
.\" @(#)icheck.8 6.4 (Berkeley) %G%
icheck \- file system storage consistency check
is obsoleted for normal consistency checking by
builds a bit map of used blocks,
and compares this bit map against
the free map maintained on the file system.
If the file system is not specified,
a set of default file systems
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
option is a list of block numbers;
whenever any of the named blocks turns up in a file,
a diagnostic is produced.
is faster if the raw version of the special file is used,
since it reads the i-list many blocks at a time.
Default file systems vary with installation.
fsck(8), dcheck(8), ncheck(8),
and bad blocks (which lie outside the file system)
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
considers it to contain 0.
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.