Horst, I can send you assembler and VMSES instructions for a working DFSMS exit FSMRMSHR (RMS Library Partitioning).
FSMRMSHR calls a Rexx EXEC to do its actual work. You would have to adjust a few assembler lines and names to convert it into your desired FSMRMDEV exit that calls a Rexx EXEC. The main effort is the 2 exits have different parameters but should be easy for adventurous, novice assembler to adjust the parameter references. The parameter types of FSMRMDEV are a subset of the types used by FSMRMSHR except for FSMRMDEV's 'Real dev address' bit(16) input parameter for which an example is probably in the 'z/Vm Application Dev Guide for Assembler'. John (Novice assembler) -------------------------------------------------------- This e-mail, including any attachments, may be confidential, privileged or otherwise legally protected. It is intended only for the addressee. If you received this e-mail in error or from someone who was not authorized to send it to you, do not disseminate, copy or otherwise use this e-mail or its attachments. Please notify the sender immediately by reply e-mail and delete the e-mail from your system. ________________________________ From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Rempel, Horst Sent: Wednesday, January 30, 2008 7:23 AM To: IBMVM@LISTSERV.UARK.EDU Subject: DFSMS for VM Exit FSRMDEV Hello VMers, we have a problem with DFSMS/RMS for VM and our IBM 3494 TapeLibrary with mixxed tapedrives 2 x 3490 and 4 x 3590. When we do mount requests without specifying a real device RMS will try to use the first available device nevertheless its a 3490 or a 3590. So the recommandation from IBM to solve our problem is to modify the exit FSMRMDEV. The exit should be written as a assembler program that calls a REXX-procedure where the logic resides. I found the following text in the redbook 'Guide to Sharing and Partitioning IBM Tape Library Dataservers' SG24-4409-02 FSMRMDEV The real-device-selection exit, FSMRMDEV, can select a device when a real device address is not specified in the incoming request. Users can provide their own device selection algorithm. The product default processing selects the first available (unattached) library tape device that can be located. The request fails if no devices are available. Note: This exit becomes highly interesting in an environment of mixed drive types where getting the correct media-drive match is critical. A sophisticated exit may be required here, to match a selected device type to a particular scratch pool being requested, or a volume serial number within a customer-defined range that represents a certain media type. Has anyone modified this exit ? I am looking for a sample how to do it ? I am familar with REXX but not really with assembler. I appreciate any sample. Kind regards, Horst Rempel Berufsgenossenschaft http://www.bgchemie.de der chemischen Industrie e-mail [EMAIL PROTECTED] Abteilung EDV/DV-ORG Kurfürstenanlage 62 69115 Heidelberg
