45xx Modular Disk Subsystem Manual for G-Series Releases

45xx Modular Disk Subsystem Manual for G-Series Releases—142466
1-1
1
Introduction
What’s in This Section
This section introduces the 45xx modular disk subsystem and its components. This
section contains these topics:
•
Overview of the 45xx Modular Disk Subsystem on page 1-1
•
Supported Systems With G-Series Releases on page 1-1
•
The Modular Storage System on page 1-1
•
Customer-Replaceable Units (CRUs) on page 1-3
•
Components of a 45xx Disk Module on page 1-4
•
Interface Components on page 1-12
•
Fault Tolerance on page 1-13
•
Site Preparation on page 1-16
Overview of the 45xx Modular Disk Subsystem
The 45xx modular disk subsystem consists of up to eight 2-gigabyte (GB), 4-GB, 8-GB,
or 18-GB 3.5-inch 45xx disk drives in a compact module. Two 45xx disk modules (up
to 16 disk drives) can be mounted in a frame that is part of the Tandem modular storage
system (see Figure 1-1
on page 1-2).
Up to 10 modules (5 frames) can be stacked to provide up to 1,440 gigabytes of
formatted storage in 0.6 square meters (6.3 square feet) of floor space (see Figure 1-11
on page 1-18). Each 45xx disk module communicates with the Tandem system through
one or two 6760 ServerNet device adapters (ServerNet/DAs). For an example, see
Figure 1-7 on page 1-12.
Supported Systems With G-Series Releases
The following host systems support the modular disk subsystem:
•
Himalaya S70000 server
•
Himalaya S7000 server
The Modular Storage System
The modular storage system provides a framework for housing the 45xx modular disk
subsystem and other storage devices. This framework consists of low-cost, common-
form-factor modules that can be stacked in an external support structure. Each module
in the modular storage system is self-contained in terms of cooling and power
distribution. Therefore, you can stack disk modules and cartridge tape modules in the
same support structure, and service providers trained by Tandem can add or remove
modules from the stack as necessary.