IBM Magstar 3494 manual Shutdown Pending State to Shutdown State, Offline State to Online State

Shutdown Pending State to Shutdown State

During this change, the library manager application is removed from memory.

Shutdown State to Library Manager Initialization State

This change occurs when the library manager controller is powered on or when a severe error occurs.

Library Manager Initialization State to Initialization Complete State

After the library manager starts the main process of the library manager application, the tape library enters the initialization complete state. No actions are taken during this change.

Offline State to Online State

The request to enter the Online state can be either operator or library manager initiated. In either case, the following steps are performed during the transition:

1.The database is examined to determine if both the teach and the inventory operations have completed. The tape library cannot enter the Online state unless they have completed.

2.The status of the interfaces to the tape subsystems and host systems is examined to determine whether any interfaces are initialized with the library manager. If at least one of the tape subsystems interfaces is initialized and the associated control unit is Online to the library manager, the tape library enters the Online state and noti®es all attached hosts. If no interfaces are initialized, the tape library enters the Online state but does not send a noti®cation.

3.If a VTS is installed, the Library Manager checks for de®ned ªFast-Readyº categories. If none are found, a message stating that Fast-Ready categories should be de®ned is displayed for 1 minute or untilOK is selected. Notify your system administrator if you see this message.

Online State to Offline State

A request to enter the Offline state is initiated by an operator. After it is requested, the transition must complete before a transition to the Online state can be requested. The following actions are performed during the change to the Offline state:

1.A noti®cation is sent to all attached hosts indicating that the tape library is entering the Offline state. The 3490E/3590 control units, Virtual Tape Servers, and the Library Managerwill fail any later host requests for tape library functions.

2.All host requests that were accepted and queued before the request to enter the Offline state are processed. Responses are provided to the requesting host as appropriate.

3.All internal commands queued before the request to enter the Offline state will complete and, if errors are detected, appropriate host noti®cations are generated.

4.After all queued commands are completed and responses are sent, the tape library enters the Offline state.

Note: The change from the Online to the Offline state can take more than ten minutes if a high-capacity output operation was started before the request to

72Magstar 3494 Tape Library Operator Guide