NAME    [Toc]    [Back]

       icheck - File system storage consistency check

SYNOPSIS    [Toc]    [Back]

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

DESCRIPTION    [Toc]    [Back]

       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 system. 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    [Toc]    [Back]

       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
 causes a core dump.

DIAGNOSTICS    [Toc]    [Back]

       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    [Toc]    [Back]

       Specifies the command path.

SEE ALSO    [Toc]    [Back]

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



                                                        icheck(8)