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mfschunktool(8)		    This is part of MooseFS	       mfschunktool(8)

NAME
       mfschunktool - checks chunk integrity offline

SYNOPSIS
       mfschunktool [-f] [-r] [-n] [-e]	[-x] chunk_file	...

DESCRIPTION
       mfschunktool  checks  chunk  integrity  using  stored  CRC checksums in
       chunk's header.	It can also 'repair'  chunk  (fix  stored  checksums).
       This  tool  may	be  useful to check last written chunks	after possible
       data corruption (power down etc.)

       Options:

       -f     turn on fast mode	(in this mode only last	block is tested	- usu-
	      ally this	is enough to find corrupted chunks)

       -r     turn  on	repair	mode  (if checksums on given chunk don't match
	      then they	will be	overwritten by checksums calculated using  ac-
	      tual data)

       -n     turn  on name fixing mode	(if the	chunk file name	is not correct
	      but there	is proper file header, the tool	will rename given file
	      using data stored	in the header)

       -e     turn  on	empty  block  crc  check for 1.0 version chunks	(force
	      checking crc values for non existing blocks - may	fail  in  case
	      of chunks	that were truncated)

       -x     turn  on reporting successful check (print 'OK' message when ev-
	      erything is correct)

REPORTING BUGS
       Report bugs to <bugs@moosefs.com>.

COPYRIGHT
       Copyright (C) 2021 Jakub	Kruszona-Zawadzki, Core	Technology Sp. z o.o.

       This file is part of MooseFS.

       MooseFS is free software; you can redistribute it and/or	modify it  un-
       der  the	 terms	of  the	GNU General Public License as published	by the
       Free Software Foundation, version 2 (only).

       MooseFS is distributed in the hope that it will be useful, but  WITHOUT
       ANY  WARRANTY;  without even the	implied	warranty of MERCHANTABILITY or
       FITNESS FOR A PARTICULAR	PURPOSE. See the GNU  General  Public  License
       for more	details.

       You should have received	a copy of the GNU General Public License along
       with MooseFS; if	not, write to the Free Software	Foundation,  Inc.,  51
       Franklin	  St,  Fifth  Floor,  Boston,  MA  02111-1301,	USA  or	 visit
       http://www.gnu.org/licenses/gpl-2.0.html

SEE ALSO
       mfschunkserver(8)

MooseFS	3.0.116-1		  August 2021		       mfschunktool(8)

NAME | SYNOPSIS | DESCRIPTION | REPORTING BUGS | COPYRIGHT | SEE ALSO

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