Use the following procedure to convert a GFS file system to a GFS2 file system.
On a Red Hat Enterprise Linux system, make a backup of your existing GFS file system.
Unmount the GFS file system from all nodes in the cluster.
gfs_fsck command on the GFS file system to ensure there is no file system corruption.
gfs2_convert . The system will display warnings and confirmation questions before converting
gfsfilesystem to GFS2.
Upgrade to Red Hat Enterprise Linux 6.
The following example converts a GFS file system on block device
/dev/shell_vg/500g to a GFS2 file system.
gfs2_convert version 2 (built May 10 2010 10:05:40)
Copyright (C) Red Hat, Inc. 2004-2006 All rights reserved.
Examining file system..................
This program will convert a gfs1 filesystem to a gfs2 filesystem.
WARNING: This can't be undone. It is strongly advised that you:
1. Back up your entire filesystem first.
2. Run gfs_fsck first to ensure filesystem integrity.
3. Make sure the filesystem is NOT mounted from any node.
4. Make sure you have the latest software versions.
Convert /dev/shell_vg/500g from GFS1 to GFS2? (y/n)y
Converting resource groups...................
24208 inodes from 1862 rgs converted.
Fixing file and directory information.
18 cdpn symlinks moved to empty directories.
Converting journal space to rg space.
Writing journal #1...done.
Writing journal #2...done.
Writing journal #3...done.
Writing journal #4...done.
Building GFS2 file system structures.
Removing obsolete GFS1 file system structures.
Committing changes to disk.
/dev/shell_vg/500g: filesystem converted successfully to gfs2.