Querying and Changing Volume Parameters

Use the tunefs.ocfs2 command to query or change volume parameters.

For example, to find out the label, UUID, and number of node slots for a volume, use the following command:

sudo tunefs.ocfs2 -Q "Label = %V\nUUID = %U\nNumSlots =%N\n" /dev/sdb

The output of the command is similar to the following:

Label = myvol
UUID = CBB8D5E0C169497C8B52A0FD555C7A3E
NumSlots = 4

Generate a new UUID for a volume by using the following commands:

sudo tunefs.ocfs2 -U /dev/sda
sudo tunefs.ocfs2 -Q "Label = %V\nUUID = %U\nNumSlots =%N\n" /dev/sdb

The output is similar to the following:

Label = myvol
UUID = 48E56A2BBAB34A9EB1BE832B3C36AB5C
NumSlots = 4