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Dual Active Accessor Status
When the dual active accessors feature is installed, it may be enabled or disabled.
Figure 31 shows the pop-up window for the transition into the dual active accessor
mode, and Figure 32 shows the pop-up window for the transition out of dual active
accessor mode. Each of these windows is shown until the transition is complete.
Informational States
In addition to the operational states, the following informational states further define
the state of the 3494 (one or more of which can occur at the same time):
Degraded operation
Indicates that a component of the library is unavailable (except 3490E/3590
and Virtual Tape Server subsystems). When Model HA1 or the Dual Active
Accessors feature is installed, this includes the ability of the standby library
manager or the standby accessor to take over in the event of a failure.
Safety interlocks open
Indicates that an interlock (front door) on the safety circuit is open.
Vision System non-operational
Indicates that the vision system has failed and is unable to read the
external volume labels on the cartridges.
Figure 31. Dual Active Accessor Status — enabling
Figure 32. Dual Active Accessor Status — disabling
Chapter 4. Operational Modes and States, and Informational States 67