Compaq 3000 manual Controller Shelf Technical Specifications

Chapter 1. Product Overview

7SCSI Cables BN37A-OE (2) for Device I/O Module 0

8SCSI Cables BN37A-OE (2) for Device I/O Module 1

1.8Specifications

Table 1–2 Controller Shelf Technical Specifications

Feature

Model

Controller shelf de- scription

Disk controller shelf

Controller model

Dual active controllers

Controller cache

Backup for cache

Controller operation (with 2 controllers)

Controller failover

Mirrored write-back cache

Write through cache

Command Queuing

Write gathering

Host channels

Drive channels

Maximum transfer rate

RAID 5 sustained transfer rate

Description

RA3000 rack mount controller shelf (DS-SWXRA-GH, -GK) RA3000 rack mount disk shelf (DS-SWXRA-GN)

BA356 style shelf with one HSZ22 controller, two 180 Watt power supplies, two host I/O modules, one dual channel Ultra –wide, single ended personality module, blue

BA356 disk SBB shelf with two 180 Watt power supplies, one single channel Ultra –wide, single ended personality module, blue

One HSZ22 standard

Yes with DS-HSZ22 second controller upgrade

16 MB standard

64 MB standard with two controllers

1000 VA “Uninterruptable Power Supply”, standard with controller shelf

Active-active (recommended)

Active-passive (spare)

Yes, automatic

Yes

Yes

Yes, 64 commands

Yes

Two UltraSCSI Wide Differential

Two UltraSCSI Wide Single ended

44.7 MB per second per controller pair

Read – 32.6 MB per second per controller pair Write – 30.6 MB per second per controller pair

EK–SMCPQ–UG. C01 1–19