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2mkfs.gfs2(8)                System Manager's Manual               mkfs.gfs2(8)
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NAME

7       mkfs.gfs2 - Make a GFS2 filesystem
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SYNOPSIS

11       mkfs.gfs2 [OPTION]... DEVICE
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DESCRIPTION

15       mkfs.gfs2 is used to create a Global File System.
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OPTIONS

19       -c MegaBytes
20              Initial size of each journal's quota change file
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22       -D     Enable debugging output.
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24       -h     Print   out   a   help   message  describing  available options,
25              then exit.
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27       -J MegaBytes
28              The size of the journals in Megabytes. The default journal  size
29              is 32 megabytes.  The minimum size is 8 megabytes.
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31       -j Number
32              The  number  of  journals  for gfs2_mkfs to create.  You need at
33              least one journal per machine that will  mount  the  filesystem.
34              If this option is not specified, one journal will be created.
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36       -O     This  option  prevents  gfs2_mkfs  from  asking for confirmation
37              before writing the filesystem.
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39       -p LockProtoName
40              LockProtoName is the name of  the   locking   protocol  to  use.
41              Acceptable  locking  protocols  are lock_dlm or if you are using
42              GFS2 as a local filesystem (1 node only), you  can  specify  the
43              lock_nolock   protocol.    If  this  option  is  not  specified,
44              lock_nolock protocol will be assumed.
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46       -q     Be quiet.  Don't print anything.
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48       -r MegaBytes
49              gfs2_mkfs will try to make Resource Groups about this big.  Min‐
50              imum  RG size is 32 MB.  Maximum RG size is 2048 MB.  A large RG
51              size may increase performance on very large  file  systems.   If
52              not  specified,  mkfs.gfs2  will choose the RG size based on the
53              size of the file system: average size file systems will have 256
54              MB  RGs, and bigger file systems will have bigger RGs for better
55              performance.
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57       -t LockTableName
58              The lock table field  appropriate  to  the  lock  module  you're
59              using.   It  is clustername:fsname.  Clustername must match that
60              in cluster.conf; only members of this cluster are  permitted  to
61              use  this file system.  Fsname is a unique file system name used
62              to distinguish this GFS2 file system from others created  (1  to
63              16 characters).  Lock_nolock doesn't use this field.
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65       -u MegaBytes
66              Initial size of each journal's unlinked tag file
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68       -V     Print program version information, then exit.
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EXAMPLE

72       gfs2_mkfs -t mycluster:mygfs2 -p lock_dlm -j 2 /dev/vg0/mygfs2
73              This  will  make  a  Global  File  System  on  the  block device
74              "/dev/vg0/mygfs2".  It will belong to "mycluster"  and  register
75              itself  as  wanting  locking  for "mygfs2".  It will use DLM for
76              locking and make two journals.
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78       gfs2_mkfs -t mycluster:mygfs2 -p lock_nolock -j 3 /dev/vg0/mygfs2
79              This will  make  a  Global  File  System  on  the  block  device
80              "/dev/vg0/mygfs2".   It  will belong to "mycluster" and but have
81              no cluster locking.  It will have three journals.
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