User`s guide

4-4 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide
Compaq Confidential – Need to Know Required
Writer: Bob Young Project: RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Comments:
Part Number: EK-SMCPO-UG. C01 File Name: e-ch4 Expansion Pedestal Option.doc Last Saved On: 12/4/00 1:49 PM
Figure 4-3 shows the rear panel power supplies.
Figure 4-3. Rear panel power supplies
Expansion Pedestal Components
The expansion pedestal contains a 16-bit, wide/differential UltraSCSI bus, an
Environmental Monitor Unit (EMU), a SCSI bus extender module, and two
universal 50/60 Hz, 100–240 VAC fan-cooled power supplies.
The single-ended UltraSCSI bus is factory-configured as one continuous bus
that runs along the backplane between the disk drive connectors and the
internal cables. These cables connect the drives to the connectors located on
the rear panel of the expansion pedestal. The device addresses on the bus are
set at the factory by an internal configuration switch. When set to a specific
position, the switch controls the addresses of each SBB slot.