8464ax0yVE_implementation_stbyst.fm Draft Document for Review February 7, 2020 3:15 pm Tapes that are created on z/OS and read into z/TPF use the same z/OS process for creating  tapes. Now, when z/TPF wants to read this z/OS-created tape, it does a specific mount of the  tape virtual server network (VSN) into a z/TPF-allocated drive by using the z/TPF ( ztplf )  commands. You can use the normal z/TPF Data Collection and Reduction reports that summarize read  and write activity to the z/TPF-allocated drive. For TS7700 specific performance, use the  normal TS7700 statistics that are offloaded to z/OS through the TS7700 Bulk Volume  Information Retrieval (BVIR) function.  z/TPF does not use functions, such as Data Class (DC), to control the logical volume size for  specific mounts. User exits enable you to set construct names for a volume. If you are not  using the user exits, you can set the default size through the TS7700 Management Interface  (MI) during logical volume insertion, as described in “Implementing Outboard Policy  Management for z/TPF” on page 827. Advanced Policy Management is supported in z/TPF through a user exit. The exit is called  any time that a volume is loaded into a drive. Then, the user can specify, through the z/TPF  user exit, whether the volume inherits the attributes of an existing volume by using the clone  VOLSER attribute. Or, the code can elect to specifically set any or all of the Storage Group  (SG), Management Class (MC), Storage Class (SC), or DC construct names. If the exit is not  coded, the volume attributes remain unchanged because the volume is used by z/TPF.  z/TPF features only one operator interface with the TS7700, which is a z/TPF functional  message that is called  ZTPLF . The various  ZTPLF  functions enable the operator to manipulate  the tapes in the library as operational procedures require. These functions include Reserve,  Release, Move, Query, Load, Unload, and Fill. For more information, see  IBM TotalStorage  3494 Tape Library: A Practical Guide to Tape Drives and Tape Automation , SG24-4632. The z/TPF host does not keep a record of the volumes in the TS7700 tape library or manages  the tape volumes in it. You can use the  QUERY  command to obtain information about the tape  volumes that are held in the TS3500/3952 Tape Library.  Service information messages (SIMs) and media information messages (MIMs) report  hardware-related problems to the operating system.  Service information message and media information message  presentation  Control data sets  Library interface  For z/TPF V1.1, APAR PJ31394 is required for this support. Consider the following information when you implement a TS7700 in a TPF environment:  Tapes that are created on z/OS and read into z/TPF TS7700 performance for z/TPF Support of large virtual volumes for z/TPF (2 GB and 4 GB) GLYPH<SM590000> Reserving a tape category does not prevent another host from using that category. You  are responsible for monitoring the use of reserved categories.  GLYPH<SM590000> Automatic insert processing is not provided in z/TPF.  GLYPH<SM590000> Currently, no IBM TMS is available for z/TPF. 824  IBM TS7700 Release 5.0 Guide