User`s guide

1-4 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: b-ch1 Product Overview.doc Last Saved On: 12/4/00 1:51 PM
Pedestal Features
The major features of the pedestal are:
■ Two differential 16-bit UltraSCSI host buses
■ Seven 3½-in disk drive SBB slots
■ One dual-channel RAID array controller
■ Second controller option for redundancy
■ Expansion pedestal option allowing up to fourteen SBB slots in a dual-
pedestal subsystem configuration
■ Memory cache expansion option for the controller
■ Redundant power provided by two fan-cooled universal AC input power
supplies (50/60 Hz, 100 to 240 VAC)
■ Cache backup provided by an external UPS
■ Environmental monitor unit (EMU) for error detection
■ The ability to hot plug SBBs without powering down the system
Pedestal Cabinet
The pedestal cabinet is a modular freestanding storage enclosure that is
completely self-contained. It has two fan-cooled power supplies, an internal
EMU circuit board, and a RAID array controller with front panel display and
control.
Figure 1–2 shows the major components in the pedestal enclosure.
Figure 1–3 identifies the items on the rear panel power supplies. The
characteristics of the pedestal cabinet are:
■ The disk drive storage capacity is seven 3½-in disk drive SBBs.
■ The subsystem slots are numbered 0 through 6 from top to bottom.
■ There are two 68-pin VHDCI female SCSI connectors on the rear panel,
which interconnect the host system to the RAID controller in the
pedestal.
■ The rear panel also contains an alarm switch, a UPS monitor connector,
an external fault condition connector, and a serial port connector (for
controller configuration).