IBM Partner Pavilion DS4100 manual RAID controller, Hot-swap fans

Hot-swap fan bays

Raid controllers

Hot-swap

power supplies

Figure 4. Back view of DS4100 base storage server

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Figure 5 shows the components at the back of the DS4100 single-controller storage server. The DS4100 single-controller storage server has a controller blank instead of a second RAID controller and a power supply blank instead of a second power supply.

Hot-swap fan bays

RAID controller

Power supply

Figure 5. Back view of DS4100 single-controller storage server

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RAID controller

Each RAID controller contains three ports for Small Form-Factor Pluggable (SFP) modules that connect to the fibre channel cables. Two of the SFP ports (labelled Host 1 and Host 2) are for host server attachment. The third SFP port (labelled Expansion) is used to connect additional expansion units to the storage server.

Note: In the DS4100 single-controller storage server, the third SFP port (labelled Expansion) is present but not active.

Each RAID controller also contains a battery to maintain cache data in the event of a power failure. For more information, see “Cache memory and RAID controller battery” on page 75.

Attention: You will lose access to data if you attempt to hot-swap the RAID controller in a DS4100 single-controller storage server.

Hot-swap fans

The storage server has two interchangeable hot-swap and redundant fan CRUs. Each fan CRU contains two fans. If one fan CRU fails, the second

10IBM TotalStorage DS4100 Storage Server: Installation, User’s, and Maintenance Guide