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From: jfjr@mbunix.mitre.org (Freedman)
Newsgroups: comp.sys.dec
Subject: IO_READ/WRITE VBLK
Message-ID: <125800@linus.mitre.org>
Date: 8 Nov 90 18:11:24 GMT
Sender: usenet@linus.mitre.org
Organization: The MITRE Corp., Bedford, MA
Lines: 9


   I am using vms after too many years. IN particular I have
qio calls to deal with. Can some one explain the difference
between IO_READ*BLK where the block is physical, logical or
virtual. The documentation I have available to me distinguishes
the calls but thats it. Why would I use one rather than the
other??

                                      Jerry Freedman,Jr