Sun Microsystems 5310 NAS manual Array FRU replacement Procedures, Replacing a Controller

7.7Array FRU replacement Procedures

This chapter provides procedures for replacing failed components in an array command module. Before using the procedures in this chapter, perform the appropriate troubleshooting steps described in Chapter 3, "Troubleshooting and Recovery" and in the Recovery Guru.

The replacement procedures described in this chapter can be performed as hot swap procedures. Hot swap refers to the ability to remove and replace a component of the command module while it is processing I/O activity.

In a fully-configured command module, each component is redundant except for the midplane circuit board. If any redundant component fails and the storage array has been configured for data redundancy, the component can be replaced without powering off the array module and without interrupting data processing.

7.7.1Replacing a Controller

Use the following procedure to replace a controller in a command module or command module.

Note – IMPORTANT To provide full functionality in dual controller configurations, the two controllers should have the same memory capacity. Although two controllers of different memories can be paired in a command module, the mismatch will cause some functions to be disabled (e.g., the cache mirroring function).

Note – IMPORTANT On dual controller command modules, a controller can be replaced without interrupting data transfer from the host. On a single controller command module, data transfer from the host must be terminated before the controller can be replaced.

7.7.1.1Tools and Equipment

■Antistatic protection

■Phillips-head screwdriver

■Replacement controller

Chapter 7 FRU/CRU Replacement Procedures 7-23