On Friday, 06/15/2007 at 10:37 AST, David Kreuter 
<[EMAIL PROTECTED]> wrote:
> XC mode is for those users that need to access SFS files from 
dataspaces. XC 
> mode lets DAT off users reach out to a dataspace, which is actually a 
virtual 
> storage system. SFSes that exploit dataspaces are for dircontrol 
directories.

At a general rule, all CMS users should be MACHINE XC.  Any old IF 
MACHINE_MODE <> "XA" THEN <do something 370ish> code needs to be cleaned 
out, anyway, as there's no such thing a 370-mode CMS any more and the 
machines don't have 370 microcode in them.

Alan Altmark
z/VM Development
IBM Endicott

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