Installation guide

Introduction

This chapter provides an overview of the SF200 storage array and the

SF72 storage enclosure, with speciﬁcations. A related documents list

provides references to supplemental information.

1.1 SF200 Storage Array Overview

The SF200 storage array is a storage rack cabinet designed to hold SF72

storage enclosures and magazine tape subsystems.

The SF200 storage array is intended to be installed on one or both sides

of a host system. All operator control panels (OCPs) project through the

front door of the storage array to allow easy access. The DSSI (Digital

Storage System Interconnect) cables from the host cabinet input/output

(I/O) panel connect to the DSSI I/O panel at the bottom rear of the storage

array. The DSSI I/O panel supports as many as 16 individual DSSI buses.

A fully conﬁgured single-host SF200 storage array uses four DSSI buses.

A fully conﬁgured dual-host SF200 storage array uses six DSSI buses.

The remaining unused DSSI buses are for future use.

Viewing the SF200 storage array from the front, note that the SF72

storage enclosures and magazine tape subsystems are arranged in the

storage array as follows (Figure 1–1):

• Levels 1, 2, and 4 are reserved for SF72 storage enclosures only.

SF72 storage enclosure upgrades are installed into these levels in the

following order: position 1, 2, 3, 4, 7, and 8.

• Level 3 is reserved for magazine tape subsystems. Magazine tape

subsystem upgrades are installed into this level in the following order:

position 5 then 6.

NOTE

The position numbers are visible on the right and left chassis side

rails when the front and rear doors of the storage array are open.

Speciﬁcations for the SF200 storage array are shown in Table 1–1.

1–1