IBM Magstar 3494 Manual Mode to Auto Mode, Initialization State to Auto, Pause, or Manual Mode

3.The operations necessary to park the cartridge accessor and remove its power are performed (see ªAuto Mode to Pause Mode (No Error)º on page 69).

4.The library completes the change to Manual mode (see ªPause Mode to Manual Modeº on page 70).

5.An attention message is sent to all attached hosts indicating that the state of the library changed.

Manual Mode to Auto Mode

When an operator wants to select Auto mode while the 3494 is in Manual mode, the operator must use the library manager. The library performs the operations to move to Pause mode and then move to Auto mode. All pop-up windows indicate that the 3494 is in Auto Pending as it is moving through Pause mode. In addition, an attention message is only sent when Auto mode is entered, not for the intermediate Pause mode. During the change from Manual to Auto mode, the following steps are performed:

1.The System Summary window indicates that the operational mode is Auto Pending.

2.The 3494 completes the change to Pause mode as described in ªManual Mode to Pause Modeº on page 70.

3.The library completes the change to Auto mode as described in ªPause Mode to Auto Modeº on page 68.

4.An attention message is sent to all attached hosts indicating that the state of the library changed.

Initialization State to Auto, Pause, or Manual Mode

During the initialization-complete state, the library manager determines which operational mode to enter. The determination is made by examining the database and the state of the cartridge accessor power. When the determination is made, the change to the selected mode occurs. The steps taken during the transition are the same as an operator request when the library is in Pause mode and Offline state.

Auto Mode to Pause Mode (Forced)

If a severe error or condition is detected, and the error or condition is such that it is not possible to continue automated operation, the library is forced into Pause mode. Power is immediately removed from the cartridge accessor and any operations in progress are stopped. When the library manager enters Pause mode, it sends an attention message to all attached hosts indicating that the state of the library changed. The state-change message and an associated unsolicited unit check indicates the error recovery action (ERA).

The Pause Mode pop-up window directs the operator to open the library. In most cases, the cartridge accessor cannot be parked.

Operational State Transitions

The tape library is only in one operational state at any time.

Chapter 4. Operational Modes and States, and Informational States 71