Using Serviceguard Extension for RAC, 4th Edition, February 2007

Maintenance and Troubleshooting
Replacing Disks
Chapter 4 209
Figure 4-1 F/W SCSI Buses with In-line Terminators
The use of in-line SCSI terminators allows you to do hardware
maintenance on a given node by temporarily moving its packages to
another node and then halting the original node while its hardware is
serviced. Following the replacement, the packages can be moved back to
the original node.
Use the following procedure to disconnect a node that is attached to the
bus with an in-line SCSI terminator or with a Y cable:
1. Move any packages on the node that requires maintenance to a
different node.
2. Halt the node that requires maintenance. The cluster will re-form,
and activity will continue on other nodes. Packages on the halted
node will switch to other available nodes if they are configured to
switch.
3. Disconnect the power to the node.