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Writer: Bob Young Project: RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Comments:
Part Number: EK-SMCPO-UG. C01 File Name: c-ch2 RAID Array Controller.doc Last Saved On: 12/4/00 1:51 PM
Chapter 2
RAID Array Controller
This chapter describes the major features and characteristics of the RAID array
controller in the RAID Array 3000 subsystem. The number of devices
supported by the controller may be limited by the enclosure.
Controller Overview
The RAID Array controller provides high performance, high-availability
access to SCSI disk array subsystems along a UltraSCSI/Wide SCSI bus. With
a modular hardware design and an intuitive configuration utility, the controller
is designed to meet a wide range of storage needs.
The controller consists of a single 5 ½ in (14.2 cm) x 8 in (20.3 cm) PCB
mounted in a sheet metal subassembly. The package consists of the controller
PCB, a 300-pin connector, mechanical insertion assists, and a LED/reset
switch interface. All signals to the controller are routed through the backplane
connector.
The unit is configured with two Ultra Wide, differential SCSI host channels
capable of transferring data to and from the host at rates up to 40 Mb/s. The
host SCSI IDs are configurable via the host parameters and can support
32-deep tagged queuing. The controller is also configured with two Ultra
Wide, single-ended SCSI disk channels capable of transferring data to and
from the disk drives at rates up to 40 Mb/s. Each channel can support up to 15
drives (14 in redundant controller subsystems).