IBM TotalStorage 3494 Tape Library, Operator'S Manual

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Informational States
In addition to the operational states, the following informational states further
define the state of the 3494 Tape Library (one or more of which can occur at the
same time):
Degraded operation
Indicates that a component of the 3494 Tape Library is unavailable (except
tape drives and VTSs). When the 3494 HA1 Option or the Dual Active
Accessors feature are 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 cannot read the external
volume labels on the cartridges.
Intervention required
Indicates that you must correct a condition in the 3494 Tape Library.
Library Manager check-1 condition
Indicates that the Library Manager has detected an unrecoverable
condition that does not allow continued execution of host requests. If the
3494 HA1 Option is installed, the Library Manager will attempt to
re-initialize or will switch to the standby Library Manager to correct the
problem.
Figure 48. Dual Active Accessor Status – Enabling
Figure 49. Dual Active Accessor Status – Disabling
Chapter 4. Operational Modes, Operational States and Informational States
103