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On the TS3500 tape library, the time can be set from IBM Ultra Scalable Specialist work items by clicking Library →  Date and Time , as shown in Figure 9-132. 

<img src='content_image/982700.jpg'>

More information about TS4500 tape library is available locally in the TS4500 GUI by clicking the question mark icon, or at IBM Knowledge Center. 

## 9.6.2 Physical Tape Library paused or degraded 

During the operation, the tape library can be paused, which might affect the related tape attach cluster, regardless of whether it is in a grid. The reasons for the pause can include an enclosure door that is being opened to clear a device after a load/unload failure or to remove cartridges from the high capacity I/O station. The following message is displayed at the host when a library is in Pause or manual mode: 

CBR3757E Library library-name  in { paused  | manual mode} operational state 

During Pause mode, all recalls and physical mounts are held up and queued by the TS7700T for later processing when the library leaves the Pause mode. Because scratch mounts and private mounts with data in the cache are allowed to run (but not physical mounts), no other data can be moved out of the cache after the currently mounted stacked volumes are filled. 

During an unusually elongated period of pause (such as during a physical tape library outage), the cache continues to fill up with data that is not migrated to physical tape volumes. This issue might lead in extreme cases to significant throttling and stopping of any mount activity in the TS7700T cluster. 

The TS7700T cluster inherited many of the behaviors from the original TS7740 with small cache size. Considering the current TS7700T with bigger cache partitions, it is possible to continuing operating with physical tape library degraded or non-operational for an extended period. 

The LI REQ PHYSLIB SETTINGS commands allow the user to keep the TS7700T tape partition to operating normally in the case of the physical tape library extended outage (with exception of recalls). The LI REQ PHYSLIB parameters allow the TS7700T to go over the licensed amount of the pending premigration tape capacity (FC 5274) without throttling the tape attach partition. 

For more information about this command, see TS7700 z/OS Host Command Line Request User’s Guide , WP101091. 

At previous levels of code, having the PRETHDEG setting disabled did help clients work around a physical tape library outage. However, after the tape library became operational 

