mkfs.gfs2

mkfs.gfs2(8)                System Manager's Manual               mkfs.gfs2(8)



NAME
       mkfs.gfs2 - Make a GFS2 filesystem


SYNOPSIS
       mkfs.gfs2 [OPTION]... DEVICE


DESCRIPTION
       mkfs.gfs2 is used to create a Global File System.


OPTIONS
       -c MegaBytes
              Initial size of each journal's quota change file

       -D     Enable debugging output.

       -h     Print  out  a  help  message  describing  available options,
              then exit.

       -J MegaBytes
              The size of the journals in Megabytes. The default journal size
              is 32 megabytes.  The minimum size is 8 megabytes.

       -j Number
              The number of journals for gfs2_mkfs to create.  You need at
              least one journal per machine that will mount the filesystem.
              If this option is not specified, one journal will be created.

       -O     This option prevents gfs2_mkfs from asking for confirmation
              before writing the filesystem.

       -p LockProtoName
              LockProtoName is the name of the  locking  protocol to use.
              Acceptable locking protocols are lock_dlm or if you are using
              GFS2 as a local filesystem (1 node only), you can specify the
              lock_nolock protocol.  If this option is not specified,
              lock_nolock protocol will be assumed.

       -q     Be quiet.  Don't print anything.

       -r MegaBytes
              gfs2_mkfs will try to make Resource Groups about this big.
              Minimum RG size is 32 MB.  Maximum RG size is 2048 MB.  A large
              RG size may increase performance on very large file systems.  If
              not specified, mkfs.gfs2 will choose the RG size based on the
              size of the file system: average size file systems will have 256
              MB RGs, and bigger file systems will have bigger RGs for better
              performance.

       -t LockTableName
              The lock table field appropriate to the lock module you're
              using.  It is clustername:fsname.  Clustername must match that
              in cluster.conf; only members of this cluster are permitted to
              use this file system.  Fsname is a unique file system name used
              to distinguish this GFS2 file system from others created (1 to
              16 characters).  Lock_nolock doesn't use this field.

       -u MegaBytes
              Initial size of each journal's unlinked tag file

       -V     Print program version information, then exit.


EXAMPLE
       gfs2_mkfs -t mycluster:mygfs2 -p lock_dlm -j 2 /dev/vg0/mygfs2
              This will make a Global File System on the block device
              "/dev/vg0/mygfs2".  It will belong to "mycluster" and register
              itself as wanting locking for "mygfs2".  It will use DLM for
              locking and make two journals.

       gfs2_mkfs -t mycluster:mygfs2 -p lock_nolock -j 3 /dev/vg0/mygfs2
              This will make a Global File System on the block device
              "/dev/vg0/mygfs2".  It will belong to "mycluster" and but have
              no cluster locking.  It will have three journals.



                                                                  mkfs.gfs2(8)