CBR4127I Library library-name not enough physical drives available.
Explanation
An error was detected during Library Automation Communication Services (LACS) processing for the MOUNT function. Library library-name returned a unit check in response to the mount order. The library sense information indicates that there are not enough physical drives available in the VTS to satisfy the mount. The VTS requires at least two physical tape devices to process mount requests. If the library is part of a Peer-to-Peer VTS configuration, all available VTS libraries in the configuration are in this state.
System action
The LACS request fails with a permanent error return code. Messages that are issued by the caller of LACS are written concurrently with this message.
Operator response
Search problem reporting databases for a fix for the problem. If no fix exists, contact the IBM® Support Center.
System programmer response
Resubmit the failing job when the physical drive limitation in the VTS has been resolved.
Source
Object Access Method (OAM)