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

Chapter 1. Introduction

The IBM TotalStorage IP Storage 200i Model EXP (storage unit) is a compact unit
that provides high-capacity, small computer system interface (SCSI) disk storage. It
supports up to 14 Ultra160 SCSI drives on a single or dual logical bus. It delivers
fast, high-volume data transfer, retrieval, and storage functions across multiple
drives, to multiple hosts. 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 storage unit.
The storage unit supports IBM Ultra160 SCSI for the host and drive interfaces and
it is designed for easy installation and integration into a variety of system
environments.
After you review the introductory information provided in this chapter, refer to
"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
unit. Therefore, you can maintain the availability of your system while a hot-swap
device is removed, installed, or replaced. See "Chapter 3. Installing and replacing
devices" on page 21 for more information.
© 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 5194-22S.
SCSI bus 2 (left side) is not used.
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