A 0 6 C 0 0 5 9

Figure 24. Library Manager

3490 Tape Subsystem Controls for Models C10, C11, C1A, C22, and C2A

The 3490E Model CXA control unit operator panel „1… and the 3490E Model CXA drive unit operator panel „2… (see Figure 25 on page 36) are accessible to the operator by opening the front door of the frame containing the tape subsystem to be accessed.

When 3490E subsystems are attached to the 3494, the following 3490E functions change:

Drive control

The loading and the unloading of volumes are controlled by the library manager. The 3490E subsystem communicates with the library manager to update the database with the drive status and the cartridge location information.

Message displays

The library manager controls which messages are displayed to prevent the messages from getting out of synchronization with the library manager during Manual mode operations.

Attention interrupt

The library manager can use the communication path to the 3490E subsystems to send information to the host.

For more information on 3490E controls and indicators, see IBM 3490 Magnetic

Tape Subsystem Enhanced Capability Models C10, C11, C1A, C22, and C2A

Chapter 2. Controls and Indicators 35

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IBM Magstar 3494 manual Drive control, Message displays