dasd.bfc2cb <bus ID of the DASD>: FORMAT F - Nonvolatile
storage terminated
Explanation
The storage director has stopped using nonvolatile
storage or cannot initiate nonvolatile storage. If this problem is
caused by a failure, an additional message will provide more information
about the failure. This is an operating system independent message
that is issued by the storage system.
User response
Check for additional messages that point out possible
failures. For more information see the documentation of your storage
system.