Symantec Veritas Cluster Server One, Installation Manual

Page: 104 / 210

104 Adding shared storage and testing disks for SCSI-3 compliance
Setting up Policy Master I/0 fencing
When each test succeeds, the display indicates the disk is ready to be
configured for I/O fencing as a COORDINATOR DISK.
Creating I/O fencing configuration files and starting I/O fencing
After setting up and testing the coordinator disk group, follow the instructions
in this section to configure it for use. When you are finished, shut down and
restart the systems
Create the I/O fencing configuration file,
/etc/vxfendg
. The rc script uses that
configuration file to generate the I/O fencing configuration file,
/etc/vxfentab
, that is required by the I/O fencing driver. Create the I/O
fencing configuration file,
/etc/vxfenmode
, that configures the vxfen module
to use either DMP devices or underlying raw character devices.
To create the /etc/vxfendg and /etc/vxfenmode files
1 Deport the disk group. Enter the following:
vxdg deport vxfencoorddg
2 Import the disk group to prevent it from being imported automatically when
the system reboots. Enter the following:
vxdg -t import vxfencoorddg
3 Deport the disk group again, so it is prevented from being used for other
purposes. Enter the following:
vxdg deport vxfencoorddg
4 On each system, create the
/etc/vxfendg
file. Enter the following:
echo “vxfencoorddg” > /etc/vxfendg
Make sure there are no spaces between the quotation marks.
5 Create
/etc/vxfenmode
. On each system in the VCS One cluster, enter the
command that corresponds to the SCSI-3 mode you have chosen. Do one of
the following:
■ For DMP configuration, enter the following:
cp /etc/vxfen.d/vxfenmode_scsi3_dmp /etc/vxfenmode
■ For raw device configuration, enter the following:
cp /etc/vxfen.d/vxfenmode_scsi3_raw /etc/vxfenmode
Setting the UseFence attribute to specify SCSI3 as its value
To set the UseFence attribute to specify SCSI3 as its value
◆
On each system on which you want to configure I/O fencing, enter the
following:
haclus -modify UseFence SCSI3