gfs_mkfs man page on YellowDog

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gfs_mkfs(8)							   gfs_mkfs(8)

NAME
       gfs_mkfs - Make a GFS filesystem

SYNOPSIS
       gfs_mkfs [OPTION]... DEVICE

DESCRIPTION
       gfs_mkfs is used to create a Global File System.

OPTIONS
       -b BlockSize
	      Set  the	filesystem block size to BlockSize (must be a power of
	      two).  The minimum block size is 512.  The FS block size	cannot
	      exceed  the  machine's  memory page size.	 On the most architecā€
	      tures (i386, x86_64, s390, s390x), the memory page size is  4096
	      bytes.   On  other  architectures it may be bigger.  The default
	      block size is 4096 bytes.	 In general,  GFS  filesystems	should
	      not deviate from the default value.

       -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 128 megabytes.	 The minimum size is 32 megabytes.

       -j Number
	      The  number  of  journals	 for  gfs_mkfs to create.  You need at
	      least one journal per machine that will mount the filesystem.

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

       -p LockProtoName
	      LockProtoName is the name of the	locking	 protocol to use.  The
	      locking protocol should be lock_dlm for a clustered file	system
	      or if you are using GFS as a local filesystem (1 node only), you
	      can specify the lock_nolock protocol.

       -q     Be quiet.	 Don't print anything.

       -r MegaBytes
	      gfs_mkfs will try to make Resource Groups (RGs) 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,  gfs_mkfs	 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.

       -s Blocks
	      Journal segment size in filesystem blocks.  This value  must  be
	      at  least	 two  and  not	large enough to produce a segment size
	      greater than 4MB.

       -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 GFS file system from others created (1 to 16
	      characters).  Lock_nolock doesn't use this field.

       -V     Print program version information, then exit.

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

								   gfs_mkfs(8)
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