Rear Panel Components; Figure 10-3 Rear View Of Tp900 Storage Module - Silicon Graphics Origin 3900 User Manual

10: SGI TP900 Storage Module

Rear Panel Components

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The rear of the TP900 storage module contains 6 bays that house power supply, cooling,
and SCSI I/O modules. See Figure 10-3. The rear of the TP900 storage module is 3 bays
wide by 2 bays high. The bays are numbered 1 and 2 from top to bottom, and 1 to 3 from
right to left.
Loopback module (1/3)
OUTPUT
GOOD
FAULT
Retaining bracket
Power supply module (2/3)
Figure 10-3 Rear View of TP900 Storage Module
The TP900 rear bays house the following components:
• Power supply module. The SGI TP900 storage system requires one 350-W power
supply module, which is mounted in the rear of the system (location 2/3). Power
supply voltage operating ranges are nominally 115 V or 230 V and are selected
automatically.
Optionally, a second power supply module (location 2/1) can be added to the
TP900 system to provide n+1 redundant power. In this n+1 redundant
configuration, the power supply modules operate together; if one power supply
module fails, the other module supplies power until the faulty unit is replaced.
The power supply module contains two LEDs that are located on the front panel of
the power supply. The green LED indicates power output. The amber LED indicates
a power supply failure.
Note: When you order a TP900 storage module with redundant power, it will also
have redundant cooling (two cooling modules).
Cooling module (1/2)
Retaining bracket
Cooling module (2/2)
I/O module (1/1)
OUTPUT
GOOD
FAULT
Power supply module (2/1)
007-4653-001