How to Replace a FC Switch or Array-to-Switch Component in a Running Cluster (Sun Cluster 3.0 12/01 Hardware Guide)

Sun Cluster 3.0 12/01 Hardware Guide

How to Replace a FC Switch or Array-to-Switch Component in a Running Cluster

Use this procedure to replace an FC switch, or the following array-to-switch components in a running cluster:

Fiber optic cable that connects an FC switch to an array
GBIC on an FC switch, connecting to an array
StorEdge network FC switch-8 or switch-16
Media Interface Adapter (MIA) on a StorEdge T3 array (not applicable for StorEdge T3+ arrays)
Interconnect cables between two interconnected arrays of a partner-group

Telnet to the array that is connected to the FC switch or component that you are replacing.

Use the T3/T3+ sys stat command to view the controller status for the two arrays of the partner group.

In the following example, both controllers are ONLINE.
t3:/:<#> sys stat Unit State Role Partner ----- --------- ------ ------- 1 ONLINE Master 2 2 ONLINE AlterM 1
See the Sun StorEdge T3 and T3+ Array Administrator's Guide for more information about the sys stat command.

Is the FC switch or component that you are replacing attached to an array controller that is ONLINE or DISABLED, as determined in Step 2?
- If the controller is already DISABLED, go to Step 5.
- If the controller is ONLINE, use the T3/T3+ disable command to disable it. Using the example from Step 2, if you want to disable Unit 1, enter the following:
  t3:/:<#> disable u1
See the Sun StorEdge T3 and T3+ Array Administrator's Guide for more information about the disable command.

Use the T3/T3+ sys stat command to verify that the controller's state has been changed to DISABLED.

t3:/:<#> sys stat
Unit   State      Role    Partner
-----  ---------  ------  -------
 1    DISABLED   Slave     
 2    ONLINE     Master

Replace the component using the following references:
- For the procedure on replacing a fiber optic cable between an array and an FC switch, see the Sun StorEdge Network FC Switch-8 and Switch-16 Installation and Configuration Guide, Sun SAN 3.0.
- For the procedure on replacing a GBIC on an FC switch, see the SANbox 8/16 Segmented Loop Switch User's Manual.
- For the procedure on replacing a StorEdge network FC switch-8 or switch-16, see the Sun StorEdge Network FC Switch-8 and Switch-16 Installation and Configuration Guide, Sun SAN 3.0.
  
  Note -
  If you are replacing an FC switch and you intend to save the switch IP configuration for restoration to the replacement switch, do not connect the cables to the replacement switch until after you recall the Fabric configuration to the replacement switch. For more information about saving and recalling switch configurations see the Sun StorEdge Network FC Switch-8 and Switch-16 Installation and Configuration Guide, Sun SAN 3.0.
  
  Note -
  Before you replace an FC switch, be sure that the probe_timeout parameter of your data service software is set to more than 90 seconds. Increasing the value of the probe_timeout parameter to more than 90 seconds avoids unnecessary resource group restarts when one of the FC switches is powered off.
- For the procedure on replacing an MIA, see the Sun StorEdge T3 and T3+ Array Installation, Operation, and Service Manual.
- For the procedure on replacing interconnect cables, see the Sun StorEdge T3 and T3+ Array Installation, Operation, and Service Manual.

If necessary, telnet to the array of the partner group that is still online.

Use the T3/T3+ enable command to enable the array that you disabled in Step 3.
t3:/:<#> enable u1
See the Sun StorEdge T3 and T3+ Array Administrator's Guide for more information about the enable command.

Use the T3/T3+ sys stat command to verify that the controller's state has been changed to ONLINE.

t3:/:<#> sys stat
Unit   State      Role    Partner
-----  ---------  ------  -------
 1    ONLINE     AlterM    2
 2    ONLINE     Master    1