Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!UCF1VM.BITNET!ASM370
From: ASM370@UCF1VM.BITNET
Newsgroups: comp.lang.asm370
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Message-ID: <8907131230.AA19898@jade.berkeley.edu>
Date: 13 Jul 89 12:30:39 GMT
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Mike:

    From VM/SP R5 System Facilities For Programming


          "The CMS RESERVE command and the CMS DISKID funtion should
           be issued before using the DASD Block I/O System Service.
           These two facilities enable you to create a uniquely organized
           CMS File on a DASD and obtain information about the file
           needed to use the DASD Block I/O System Service. ....."

          "The CMS RESERVE command allocates all available blocks of
           512, 1K, 2K, or 4K-byte block formatted minidisk to a unique
           CMS file. ....."

    It would seem that is your disk is not in CMS format, DASD Block I/O
    System Service is not what you want.

Doug