Chapter 1. Introduction; Features At A Glance; Storage Unit Drive Bays - IBM TotalStorage 200 Installation And User Manual

Chapter 1. Introduction

The 5194 Network Attached Storage Model EXU Storage Unit is a compact unit that
provides high-capacity, small computer system interface (SCSI) disk storage. It
supports 14 36.4 GB 10K rpm Ultra160 SCSI drives on a single logical bus. It
delivers fast, high-volume data transfer, retrieval, and storage functions across
multiple drives. The storage unit is designed for continuous, reliable service; the
modular, redundant disk drives, power supplies with built-in fans, and environmental
services monitor (ESM) boards use hot-swap technology for easy replacement
without turning off the engine to which the storage unit is attached, and in some
cases, without turning off the storage unit.
The storage unit supports IBM Ultra160 SCSI for the host and drive interfaces and
is designed for easy installation and integration into a variety of system
environments.
After you review the introductory information provided in this chapter, see
"Chapter 2. Installing the storage unit" on page 9 to begin the installation process.

Features at a glance

The following table summarizes the features of the storage unit. For a list of the
operating specifications, such as weight, height, and heat output, see "Operating
specifications" on page 9.
General
v Modular components:
– High-capacity disk drives
– Environmental services
monitor (ESM) boards
– Power supplies with built-in
fans
v Technology:
– Supports disk array
technology
– Supports clustering
– SCSI (Ultra160) host interface
– Redundant data storage,
power and cooling system,
and ESM boards
– Hot-swap technology for
drives, power supplies with
built-in fans, and ESM boards

Storage unit drive bays

The following sections describe the hot-swap CRUs, the switch card bay, and the
bridge card bay on the storage unit.
With the hot-swap features of the storage unit, you can remove and replace hard
disk drives, power supplies/fans, and ESM boards without turning off the storage
© Copyright IBM Corp. 2001
v User interface:
– Built-in power, activity, and
fault indicators
– Identification labeling on
customer replaceable units
(CRUs), rear indicator lights,
switches, and connectors
– Easy-to-replace drives, power
supplies, ESM boards, and
fans
Disk drive storage
v Current capabilities:
Maximum drives per storage unit:
14
ESM boards
v Technology and interfaces:
– SCSI: Ultra160
– SCSI bus interface: Two
68-pin, Very High Density
Connector Interface (VHDCI)
connectors for SCSI bus
cables
Note: Connect only SCSI bus 1
(right side) connector to the
5194-225. SCSI bus 2 (left side) is
not used.
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