Setting Up Disk-Based I/O Fencing Manually; Setting Up Coordinator Disk Groups - Symantec Veritas Cluster Server Installation Manual

Setting up disk-based I/O fencing manually

Setting up coordinator disk groups

Make sure you completed the preparatory tasks before you set up I/O fencing.
Tasks that are involved in setting up I/O fencing include:
Tasks to set up I/O fencing manually
Table 5-1
Action
Setting up coordinator disk
groups
Creating I/O fencing
configuration files
Modifying VCS configuration
to use I/O fencing
Verifying I/O fencing
configuration
From one node, create a disk group named vxfencoorddg. This group must contain
three disks or LUNs. If you use VxVM 5.0 or later, you must also set the coordinator
attribute for the coordinator disk group. VxVM uses this attribute to prevent the
reassignment of coordinator disks to other disk groups.
Note that if you create a coordinator disk group as a regular disk group, you can
turn on the coordinator attribute in Volume Manager.
Refer to the Veritas Volume Manager Administrator s Guide for details on how to
create disk groups.
The following example procedure assumes that the disks have the device names
sdx, sdy, and sdz.
To create the vxfencoorddg disk group
1 On any node, create the disk group by specifying the device names:
# vxdg init vxfencoorddg sdx sdy sdz
2 If you use VxVM 5.0 or later, set the coordinator attribute value as "on" for
the coordinator disk group.
# vxdg -g vxfencoorddg set coordinator=on
Configuring VCS clusters for data integrity
Setting up disk-based I/O fencing manually
Description
See "Setting up coordinator disk groups"
See "Creating I/O fencing configuration files"
See "Modifying VCS configuration to use I/O fencing"
on page 101.
See "Verifying I/O fencing configuration"
99
on page 99.
on page 100.
on page 102.