Interface Ports And Switches; Ds4300 Single-Controller Storage Server (Model 6Lu And 6Lx) Back View - IBM TotalStorage DS4000 Hardware Maintenance Manual

Figure 48. DS4300 single-controller storage server (model 6LU and 6LX) back view
Note: The graphics used in this document are for illustrative purposes only. The
RAID controller
Hot-swap fans
Hot-swap power supplies

Interface ports and switches

Figure 49 on page 69 shows the ports and switches on the back of the storage
server.
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IBM TotalStorage DS4000: Hardware Maintenance Manual
appearance of the actual device may differ from the graphic.
Each RAID controller contains three ports for SFP modules that connect to
the fibre channel cables. Two of the ports, which are labeled Host 1 and
Host 2, are used to connect to host servers. The third port, which is labeled
Expansion and is available on the DS4300 model 60U and 60X only, is used
to connect additional expansion units to the storage server.
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 74.
Note: The DS4300 single-controller storage server (model 6LU and 6LX)
contains only one RAID controller.
The storage server has two interchangeable hot-swap and redundant fan
FRUs. Each fan FRU contains two fans. If one fan FRU fails, the second fan
FRU continues to operate. Both fan FRUs must be installed to maintain
proper cooling within your storage server, even if one fan FRU is not
operational.
Note: The DS4300 single-controller storage server (model 6LU and 6LX)
contains only one fan.
The DS4300 dual-controller storage server (model 60U and 60X) comes
with two hot-swap power supplies. Both power supplies must be installed
to maintain proper cooling.
Note: The DS4300 single-controller storage server (model 6LU and 6LX)
comes with one power supply. You must keep the second power
supply cover on to maintain proper cooling.