Managing Serviceguard Seventeenth Edition, First Reprint December 2009

NOTE: The first partition, identified by the device file /dev/dsk/c1t4d0s1 or

/dev/disk/disk12_p1 in this example, is reserved by EFI and cannot be used

for any other purpose.

4. Create the device files on the other cluster nodes.

Use the command insf -e on each node. This will create device files

corresponding to the three partitions, though the names themselves may differ

from node to node depending on each node’s I/O configuration.

5. Define the lock LUN; see “Defining the Lock LUN”.

Defining the Lock LUN

Use cmquerycl -L to create a cluster configuration file that defines the lock LUN.

• If the pathname for the lock LUN is the same on all nodes, use a command such

as:

cmquerycl -C $SGCONF/config.ascii -L /dev/dsk/c0t1d1 -n

• If the pathname for the lock LUN is different on some nodes, you must specify the

path on each node; for example (all on one line):

cmquerycl -C $SGCONF/config.ascii -n <node1> -L

/dev/dsk/c0t1d1 -n <node2> -L /dev/dsk/c0t1d2

These commands create a configuration file which you can apply to the cluster

configuration when you are ready to do so; see “Distributing the Binary Configuration

File ” (page 235). See also “Specifying a Lock LUN” (page 223).

CAUTION: Once you have specified the lock LUN in the cluster configuration file,

running cmapplyconf will destroy any data on the LUN.

Excluding Devices from Probing

When you run cmquerycl to configure the cluster, Serviceguard probes disk devices

(devices with paths that begin with /dev/dsk/ and /dev/disk) to see if they are

configured under the LVM, LVM2, or VxVM volume manager. By design, devices such

as CD and DVD drives are omitted, but occasionally such a device may use a description

string that Serviceguard does not recognize. The description string appears in the

Description field of the output of ioscan -funC disk, and you can see what

types of device Serviceguard will exclude from probing by looking at the TYPE field

of the file /etc/cmcluster/cmignoretypes.conf.

208 Building an HA Cluster Configuration