Red Hat GFS 6.0 -, Administrator'S Manual

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Appendix C. Basic GFS Examples 155
Major Minor #Blocks Name
8 16 8388608 sda
8 17 8001 sda1
8 18 8377897 sda2
8 32 8388608 sdb
8 33 8388608 sdb1
Table C-14. Storage Device Information
Notes
For shared storage devices to be visible to the nodes, it may be necessary to load an appropriate
device driver. If the shared storage devices are not visible on each node, confirm that the device
driver is loaded and that it loaded without errors.
The small partition (
/dev/sda1
) is used to store the cluster configuration information. The two re-
maining partitions (/
dev/sda2
,
sdb1
) are used for the GFS file systems.
You can display the storage device information at each node in your GFS cluster by running the follow-
ing command:
cat /proc/partitions
. Depending on the hardware configuration of the GFS nodes,
the names of the devices may be different on each node. If the output of the
cat /proc/partitions
command shows only entire disk devices (for example,
/dev/sda
instead of
/dev/sda1
), then the
storage devices have not been partitioned. To partition a device, use the
fdisk
command.
C.4.2. Kernel Modules Loaded
Each node must have the following kernel modules loaded:
• gfs.o
• lock_harness.o
•
lock_gulm.o
• pool.o
C.4.3. Setup Process
The setup process for this example consists of the following steps:
1. Create pool configurations for the two file systems.
Create pool configuration files for each file system’s pool:
pool_gfs01
for the first file system,
and
pool_gfs02
for the second file system. The two files should look like the following:
poolname pool_gfs01
subpools 1
subpool 0 0 1
pooldevice 0 0 /dev/sda2
poolname pool_gfs02
subpools 1