Using the maintenance analysis procedures

The maintenance analysis procedures (MAPs) inform you how to analyze a failure that occurs with a SAN Volume Controller node.

About this task

SAN Volume Controller nodes must be configured in pairs so you can perform concurrent maintenance.

When you service one node, the other node keeps the storage area network (SAN) operational. With concurrent maintenance, you can remove, replace, and test all field replaceable units (FRUs) on one node while the SAN and host systems are powered on and doing productive work.

Note: Unless you have a particular reason, do not remove the power from both nodes unless instructed to do so. When you need to remove power, see MAP 5350: Powering off a node.

Procedure

To isolate the FRUs in the failing node, complete the actions and answer the questions given in these maintenance analysis procedures (MAPs).
When instructed to exchange two or more FRUs in sequence:
1. Exchange the first FRU in the list for a new one.
2. Verify that the problem is solved.
3. If the problem remains:
  1. Reinstall the original FRU.
  2. Exchange the next FRU in the list for a new one.
4. Repeat steps 2 and 3 until either the problem is solved, or all the related FRUs have been exchanged.
5. Complete the next action indicated by the MAP.
6. If you are using one or more MAPs because of a system error code, mark the error as fixed in the event log after the repair, but before you verify the repair.
Note: Start all problem determination procedures and repair procedures with MAP 5000: Start.