Red Hat ENTERPRISE LINUX 5 - GLOBAL FILE SYSTEM 2 Manual page 38

Chapter 3. Managing GFS2
Since this file system contains 4294967296 blocks, multiply that number by 5/8 to determine how
many bytes of memory are required:
4294967296 * 5/8 = 2684354560
This file system requires approximately 2.6GB of free memory to run the fsck.gfs2 command. Note
that if the block size was 1K, running the fsck.gfs2 command would require four times the memory,
or approximately 11GB.
Usage
fsck.gfs2 -y BlockDevice
-y
The -y flag causes all questions to be answered with yes. With the -y flag specified, the
fsck.gfs2 command does not prompt you for an answer before making changes.
BlockDevice
Specifies the block device where the GFS2 file system resides.
Example
In this example, the GFS2 file system residing on block device /dev/testvol/testlv is repaired.
All queries to repair are automatically answered with yes.
[root@dash-01 ~]# fsck.gfs2 -y /dev/testvg/testlv
Initializing fsck
Validating Resource Group index.
Level 1 RG check.
(level 1 passed)
Clearing journals (this may take a while)...
Journals cleared.
Starting pass1
Pass1 complete
Starting pass1b
Pass1b complete
Starting pass1c
Pass1c complete
Starting pass2
Pass2 complete
Starting pass3
Pass3 complete
Starting pass4
Pass4 complete
Starting pass5
Pass5 complete
Writing changes to disk
fsck.gfs2 complete
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