CBR3792E Library library-name has entered the limited cache free space warning state.
Explanation
The available cache in library library-name has entered the limited cache resource warning state.
TS7700
Virtualization Engine: When the TS7700 Virtualization Engine determines
that the amount of cache space occupied by valid data rises above
a point that is 2 terabytes below threshold, the library enters this
state. Prior to Release 1.7 of the TS7700 (PGA1), the threshold was
defined at 95% of the configured cache capacity and starting with
that release, the threshold is now defined at 1 TB below the configured
cache capacity. The disk cache repository referenced is the primary
(non-data deduplication) deep disk cache. 
TS7680 ProtecTier Deduplication Gateway: When the TS7680 determines that the amount of available cache space is less than 3 terabytes, the library enters this state.
System action
Mounts and host I/O transfers continue to be accepted.
TS7700 Virtualization Engine:
This is a warning state and indicates that the TS7700 Virtualization
Engine might soon run out of cache resources unless older data is
removed from the TS7700. This state is left
when the TS7700 determines that the amount
of cache space occupied by valid data falls below a point that is
2.5 terabytes below threshold. In addition
to reporting the individual distributed library's state, the composite
state of all of the TS7700 subsystems in the
configuration is also reported. Prior to Release
1.7 of the TS7700, if one or more of the distributed libraries
are in this state, the associated composite library is also in this
state. Starting with Release 1.7 of the TS7700,
the composite library is only in this state if all of the distributed
libraries (with this type of cache) are in this state. Message
CBR3793I is issued when a library has left this state.
TS7680 ProtecTIER® Deduplication Gateway: This is a warning state and indicates that the TS7680 might soon run out of cache resources unless older data is removed from the TS7680. This state is left when the TS7680 determines that the amount of available cache space is greater than 3.5 terabytes. Message CBR3793I is issued when the library has left this state.
Operator response
As appropriate, copy or remove (return to scratch) older data from the library.
System programmer response
See the operator response.
Source
Object Access Method (OAM)
Routing Code
2,3,5
Descriptor Code
11