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Structure of the shuttle complex
In order to meet the needs of large data center archives that have to store
increasing amounts of data, the TS3500 Tape Library offers shuttle technology that
enables flexible library growth on a z-axis. This growth flexibility, enabled by
shuttle connections between HD libraries, allows a higher maximum capacity for a
single library image of multiple TS3500 library strings. This flexibility also
accommodates constrained data center layouts that do not have room to expand on
the x-axis, as well as data centers with large archives that exceed the maximum
cartridge count of an individual TS3500 Tape Library string.
Unlike passthrough automation technologies that pass tape cartridges through
intermediary libraries, the TS3500 Tape Library transports tape cartridges in shuttle
cars that pass over the libraries. This method of transporting cartridges is called
direct flight
. With the direct flight capability, if there is no drive available in the
home logical library, the cartridge is moved across a
shuttle connection
to a logical
library with an available drive. This configuration of interconnected parallel library
strings is called a
shuttle complex
. The components of a shuttle complex (shown in
Figure 8 on page 16) are described below:
1
Shuttle station
The shuttle station mounts on top of an HD frame. It consists of a base
pad and a shuttle slot. The shuttle slot docks into the base pad. When the
shuttle slot is all the way down into the frame station it can accept or
deliver a cartridge. Each shuttle station has its own import/export element
(IEE) address.
2
Shuttle span
One or more shuttle spans are linked together in order to form a shuttle
connection between HD frames in parallel library strings. Shorter shuttle
spans support distances between library strings ranging from 762 mm (30
in) to 1 524 mm (60 in). Longer shuttle spans support distances between
library strings ranging from 1 524 mm (60 in) to 2 743.2 mm (108 in).
3
Shuttle connection
A shuttle connection is comprised of one shuttle car, two or more shuttle
stations, and one or more spans between these shuttle stations. Each
shuttle connection supports one shuttle car.
Shuttle car (not shown)
The shuttle car is the mechanism that carries one tape cartridge through
the shuttle connection to another library string. Each shuttle car carries one
tape cartridge at a time.
Chapter 1. Introduction
15
Summary of Contents for System Storage TS3500
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