drbdmeta - DRBD's meta data management tool

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

       create-md --peer-max-bio-sizeval--al-stripesval--al-stripe-size-kBval

           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.

           If you will use the resource before it is connected to its peer for the first time DRBD may perform
           better if you use the --peer-max-bio-size option. For DRBD versions of the peer use up to these
           values: <8.3.7 -> 4k, 8.3.8 -> 32k, 8.3.9 -> 128k, 8.4.0 -> 1M.

           If you want to use more than 6433 activity log extents, or live on top of a spriped RAID, you may
           specify the number of stripes (--al-stripes, default 1), and the stripe size (--al-stripe-size-kB,
           default 32). To just use a larger linear on-disk ring-buffer, leave the number of stripes at 1, and
           increase the size only:

           drbdmeta0v08/dev/vg23/lv42internalcreate-md--al-stripe-size1M

           To avoid a single "spindle" from becoming a bottleneck, increase the number of stripes, to achieve an
           interleaved layout of the on-disk activity-log transactions. What you give as "stripe-size" should be
           what is a.k.a. "chunk size" or "granularity" or "strip unit": the minimum skip to the next "spindle".

           drbdmeta0v08/dev/vg23/lv42internalcreate-md--al-stripes7--al-stripe-size64k

       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           Sets the outdated flag in the meta data.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.

       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.

       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.

       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.

       drbdmeta - DRBD's meta data management tool

       --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.

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

drbdadm(8)

DRBD 8.4.11                                        20 Mar 2020                                       DRBDMETA(8)

drbdmeta [--force] [--ignore-sanity-checks] {device} {v06 minor | v07 meta_devindex |
                v08 meta_devindex} {command} [cmdargs...]

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