User`s guide

Power Subsystem
007-4274-001 9
C. Hard Drive
D. Connector
E. Locking Handle
Each hard drive is connected to an Ultra 160 SCSI hot-swap backplane. The backplane
provides industry-standard 80-pin SCA-2 connectors for each hard drive and accepts
10,000 RPM or slower drives that consume up to 23 watts of power. If another type or a
slower Ultra 160 SCSI SCA drive is installed, make sure that the drive meets these
backplane and carrier requirements.
An LED above each hard drive displays the status of that hard drive. Table 1-3 shows the
hard drive LED state status.
Power Subsystem
The SGI 1450 server uses a universal input-switching power subsystem (PSBS). This
subsystem provides up to 630 watts DC. The subsystem also minimizes the RMS current
drawn from each AC line by providing power-factor corrected AC input. The chassis can
be configured with one, two, or three 350-watt power supply modules, where each is
designed to minimize electromagnetic interference (EMI) and radio frequency
interference (RFI).
Table 1-3 Hard Drive LED State Status
LED State Status
Solid green The hard drive is present and powered on.
Flashing green The hard drive is active.
Solid yellow There is an asserted fault status on the hard drive.
Flashing yellow A rebuild of the hard drive is in progress.
Off The hard drive is not powered on.