DRBDMETA(8)						       System Administration						       DRBDMETA(8)

NAME

       drbdmeta - DRBD's meta data management tool .

SYNOPSIS

       drbdmeta [--force] [--ignore-sanity-checks] {device} {v06 minor | v07 meta_dev index | v08 meta_dev index} {command} [cmd args...]

DESCRIPTION

       Drbdmeta is used to create, display and modify the contents of DRBD's meta data storage. Usually you do not want to use this command
       directly, but start it via the frontend drbdadm(8).

       This command only works if the DRBD resource is currently down, or at least detached from its backing storage. The first parameter is the
       device node associated to the resource. With the second parameter you can select the version of the meta data. Currently all major DRBD
       releases (0.6, 0.7 and 8) are supported.

OPTIONS

       --force
	   All questions that get asked by drbdmeta are treated as if the user answered 'yes'.

       --ignore-sanity-checks
	   Some sanity checks cause drbdmeta to terminate. E.g. if a file system image would get destroyed by creating the meta data. By using
	   that option you can force drbdmeta to ignore these checks.

COMMANDS

       create-md
	   Create-md initializes the meta data storage. This needs to be done before a DRBD resource can be taken online for the first time. In
	   case there is already a meta data signature of an older format in place, drbdmeta will ask you if it should convert the older format to
	   the selected format.

       get-gi
	   Get-gi shows a short textual representation of the data generation identifier. In version 0.6 and 0.7 these are generation counters,
	   while in version 8 it is a set of UUIDs.

       show-gi
	   Show-gi prints a textual representation of the data generation identifiers including explanatory information.

       dump-md
	   Dumps the whole contents of the meta data storage including the stored bit-map and activity-log in a textual representation.

       outdate
	   Sets the outdated flag in the meta data. This is used by the peer node when it wants to become primary, but cannot communicate with the
	   DRBD stack on this host.

       dstate
	   Prints the state of the data on the backing storage. The output is always followed by '/DUnknown' since drbdmeta only looks at the
	   local meta data.

       check-resize
	   Examines the device size of a backing device, and it's last known device size, recorded in a file /var/lib/drbd/drbd-minor-??.lkbd. In
	   case the size of the backing device changed, and the meta data can be found at the old position, it moves the meta data to the right
	   position at the end of the block device.

EXPERT'S COMMANDS
       Drbdmeta allows you to modify the meta data as well. This is intentionally omitted for the command's usage output, since you should only
       use it if you really know what you are doing. By setting the generation identifiers to wrong values, you risk to overwrite your up-to-data
       data with an older version of your data.

       set-gi gi
	   Set-gi allows you to set the generation identifier.	Gi needs to be a generation counter for the 0.6 and 0.7 format, and a UUID set for
	   8.x. Specify it in the same way as get-gi shows it.

       restore-md dump_file
	   Reads the dump_file and writes it to the meta data.

VERSION

       This document was revised for version 8.3.2 of the DRBD distribution.

AUTHOR

       Written by Philipp Reisner philipp.reisner@linbit.com and Lars Ellenberg lars.ellenberg@linbit.com.

REPORTING BUGS

       Report bugs to drbd-user@lists.linbit.com.

COPYRIGHT

       Copyright 2001-2008 LINBIT Information Technologies, Philipp Reisner, Lars Ellenberg. This is free software; see the source for copying
       conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO

       drbdadm(8)

DRBD 8.3.2							    15 Oct 2008 						       DRBDMETA(8)