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Installation
3-3
Compaq Confidential – Need to Know Required
Writer: Everett Godaire Project: TL891 MiniLibrary System User's Guide Comments:
Part Number: ER-TL891-UA.A01 File Name: d-ch3 Installation Last Saved On: 3/2/99 2:30 PM
Planning Your Installation
The MiniLibrary System is intended to be mounted in a Compaq Cabinet,
StorageWorks SW500, SW600, SW800 or a standard 19-inch EIA/RETMA
equipment rack with a depth of 24 to 30 inches. Each module is shipped with
EIA/RETMA slides installed. Additional hardware for mounting in Compaq
and SW500, SW600, and SW800 cabinets is included
Every Compaq MiniLibrary System includes:
■
One Expansion Unit
■
One Expandable Pass-Through Mechanism
■
One to five Base Modules, each with one or two TZ89 drives
The Expansion Unit has 16 slots and no drives, and serves as controller of the
MiniLibrary System. The base modules each have 10 slots plus one or two
drives. The Expansion Unit and the Base Module(s) each occupy 7 inches of
rack space height.
The Pass-Through mechanism is composed of a motor drive assembly plus
sections of track whose combined length is equal to the combined heights of
the Expansion Unit plus the Base Modules. One extension section of track is
needed for the installation of each additional MiniLibrary module.
Positioning the Modules
The Expansion Unit must be mounted at the top of the stack, which places its
control panel at a convenient height. The control panels of the Base Modules
are of secondary importance, as they serve mainly to help localize system
failures. When installed, the motor drive assembly of the Pass-Through
mechanism is directly behind the Expansion Unit.
Base modules may be installed anywhere below the Expansion Unit, in any
order. There may be a slight performance advantage in making the Base
Modules contiguous, but gaps are permitted. The size of a gap is limited by the
fact that each gap must be bridged by some number of 7” Pass-Through
mechanism track sections. For safety, available cover plates should be
installed on all Pass-Through mechanism sections which are not connected to
MiniLibrary System modules.
The Expansion Unit senses the position of each module during initialization at
power-up. Even if there are gaps between modules, the system will operate
correctly. If you plan to leave gaps between modules, be sure to order
additional Pass-Through mechanism track segments and cover plates equal to
the length of the gap.