Location Of Sfps And Fiber-Optic Cables - IBM TotalStorage DS4300 Installation, User's, And Maintenance Manual

Note: Avoid operating the DS4300 storage subsystem with controllers of different
To replace a RAID controller, perform the following steps:
Figure 98. Location of SFPs and fiber-optic cables
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IBM TotalStorage DS4300 Fibre Channel Storage Subsystem: Installation, User's, and Maintenance Guide
cache sizes. Operating the storage subsystem with controllers of different
cache size will disable caching and might adversely affect performance.
1. Check the Storage Manager client online Help for instructions on RAID
controller failure-recovery procedures. Follow the steps provided in the
software documentation before continuing with step 2.
2. 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.).
3. From the RAID controller that has failed, remove the fibre-channel cables from
the SFPs. The location of these components is shown in Figure 98.
SFP module
Fiber-optic
cable
After removing the fibre-channel cables, insert the protective caps.
4. 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 33.
b. Unlock the SFP module latch:
v For SFP modules that contain plastic tabs, unlock the SFP module latch
by pulling the plastic tab outward 10°, as shown in Figure 99 on page
137.
Raid controller