The
2-byte field that used to be called device address, or channel/unit address, was
changed with S/370-XA, and since ca. 1982 has been called the device number.
Device numbers are canonical across systems. At least that was the response
I got when I asked IBM-MAIN if they were many months ago.
Not true, I am afraid. Although most customers gen the same device as
the same MVS device number on all systems, for simplicity, there is no
requirement that they do so. We have encountered a few customers where
it is not true.
Plus you now have products like FDRPAS and its competitor which can move
volumes to new device addresses transparently, so the ENQ would suddenly
become wrong.
--
Bruce A. Black
Senior Software Developer for FDR
Innovation Data Processing 973-890-7300
personal: [EMAIL PROTECTED]
sales info: [EMAIL PROTECTED]
tech support: [EMAIL PROTECTED]
web: www.innovationdp.fdr.com
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