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As you view the library from the front, Service Bay A is in the leftmost frame and
it spans columns 3 - 8. Service Bay-A is where the A accessor moves to when it is
placed in service. Service Bay-B is in the rightmost frame and it spans columns 5 -
10. Service Bay-B is where the B accessor moves to when it is placed in service.
Integrated Service Bays reduce the number of unused storage columns in a dual
accessor library from 22 to 14. While an accessor is in service, the media columns
in that area are not available to the second accessor.
In frame one, the location of the I/O Stations fall within the service bay area.
Therefore, only Dx5 frames without the I/O station and Sx5 frames are supported
as frame one in a dual accessor configuration. The rightmost frame can be an Lx5,
Dx5, or Sx5 model.
Related concepts:
"Elastic capacity" on page 28
In a dual-accessor configuration, the TS4500 tape library contains limited access
columns that you can use for special situations. You can use these columns to store
least recently used data cartridges, or as a temporary overflow area. The use of the
limited access columns (Elastic Capacity) allows dual-accessor customers to achieve
the same storage capacity as if the library was single accessor.
Components of the TS4500 tape library
The TS4500 tape library consists of one or more library frames, and other
components for powering the library and installed tape drives and for handling
and storing tape cartridges.
Refer to Figure 5 on page 13 to view the location of each component.
1 Library frames
The base frame (Lx5 models) and the expansion frames (Dx5 and Sx5
models) are the building blocks of the library. Each frame contains a rail
system, high-density cartridge storage slots, and internal LED lighting. The
Lx5 and Dx5 frames also contain slots for up to 16 tape drives.
Note: The LED lighting in the HD frames is specifically designed for use only in
the TS4500 tape library and is not suitable for other applications
2 Rail system
The assembly on which the cartridge accessor moves through the library.
The system includes the top and bottom rails.
3 Cartridge accessor
The assembly that moves tape cartridges between storage slots, tape
drives, and the I/O stations.
4 Accessor controller
A circuit board that facilitates all accessor motion requests (such as
calibrations, moves, and inventory updates).
5 Cartridge storage slots
Single-deep cells that are mounted on the door of the frame each store one
tape cartridge. High-density cells inside of the frame each store 4 (3592) or
5 (LTO) tape cartridges. Mixed media (a combination of 3592 and LTO tape
cartridges) is not supported within individual frames or within the TS4500
tape library.
6 IBM LTO or 3592 tape drives
One or more units that are mounted in the frame that read and write the
data that is stored on tape cartridges. IBM LTO tape drives and 3592 tape
11
Chapter 1. Overview
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