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TL891 MiniLibrary System User's Guide
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
4.
Ensure that the bottom edge of the pass-through mechanism motor drive
section is flush with the bottom surface of the module chassis. If
necessary, adjust the vertical position of the angle brackets.
5.
Repeat steps 3 and 4 at the bottom module. Tighten all of the screws that
hold the pass-through mechanism to the angle brackets while ensuring
that:
6.
The pass-through mechanism is centered horizontally, as indicated by
the flange engaging the slot on the top and bottom modules, and
7.
It is centered vertically, as indicated by the bottom of the bottom of the
pass-through mechanism being flush with the bottom of the lowest
module, and
8.
The pass-through mechanism is pressed firmly against the backs of the
top and bottom modules.
9.
One by one, push the remaining modules into place and tighten the
captive screws. In each case, ensure that the module does not bind
against an adjacent module, that clearance between modules is evenly
divided between top and bottom, and that the flange on the pass-through
mechanism engages the slot on the back of the module.
10.
If binding occurs, or if the module is not centered on the pass-through
mechanism, loosen the four screws that secure the slides of the binding
module to the front rails and the four screws that secure the slides to the
rear rails, reposition the slides, then retighten the screws.
11.
If necessary, repeat steps 6 and 7 until the module does not bind against
the slides or against adjacent modules.
12.
Repeat steps 6, 7, and 8 for all of the remaining modules.
Interfaces and Cabling
Refer to Figure 3-15. The connections required depend on the type of module.
The Expansion Unit always has the SCSI connection to the host for the library
robotics. Base modules have a separate SCSI connection to the host for each
drive*, but the SCSI connectors for the robotics should not be used. The
portion of the library robotics that is located in the Base Modules is controlled
by the Expansion Unit through a cable connected to the Expansion Interface
connector on each module. Each module has a separate AC power connection.
*IMPORTANT:
In principle it is possible to daisy-chain the SCSI connections for multiple
drives, to save SCSI controllers. Compaq strongly recommends against this practice
because it may severely limit the data throughput performance and reliability of the
library.
