IBM Partner Pavilion DS4100 manual To replace a RAID controller, perform the following steps

Note: Avoid operating the DS4100 with controllers of different cache sizes. Operating the storage server with controllers of different cache size will disable caching and might adversely affect performance. Always verify that you replace a failed controller with a controller that has the same FRU part number.

To replace a RAID controller, perform the following steps:

1.DS4100 single-controller storage server only:

The DS4100 single-controller storage server has only one RAID controller. If you are replacing a failed RAID controller in the DS4100 single-controller storage server, you do not need to power down the DS4100 before replacing the RAID controller.

If you are replacing a functioning (non-failed) RAID controller in the DS4100 single-controller storage server, do not remove or replace the RAID controller in the DS4100 single-controller storage server without first stopping the host applications, unmounting the logical drives from the host server, and powering down the storage subsystem.

2.Check the DS4000 Storage Manager client for instructions on RAID controller failure-recovery procedures. Follow the steps provided in the software documentation before continuing with the following step.

3.Label each cable that connects to the RAID controller that has failed. This ensures that all cables will be properly reconnected to the new RAID controller.

Attention: Handle and install fiber-optic cables properly to avoid degraded performance or loss of communications with devices. When working with fiber-optic cables, do not pinch them, step on them, or locate them in aisles or walkways. Do not overtighten the cable straps or bend the cables to a radius smaller than 38 mm (1.5 in.).

4.From the RAID controller that has failed, remove the fibre-channel cables from the SFPs. The location of these components is shown in Figure 71.

RAID controller

SFP module

Fiber-optic cable

Figure 71. Location of SFPs and fiber-optic cables

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After removing the fibre-channel cables, insert the protective caps.

5.Use the following procedure to remove the SFPs from the RAID controller that has failed.

a.Remove the LC-LC fibre-channel cable from the SFP module. For more information, see “Handling fiber-optic cables” on page 45.

Chapter 5. Installing and replacing components 97