We did a study some years ago and now have an IECIOS00 of:
HOTIO DFLT110=(CHPK,CHPF)
HOTIO DFLT111=(CHPK,CHPF)
HOTIO DFLT112=(CHPK,CHPF)
HOTIO DFLT110=(CUK,BOX)
HOTIO DFLT111=(CUK,BOX)
HOTIO DFLT112=(CUK,CHPF)
I don't remember the reasoning very well, except that asking the operator
seemed like a good way to slow recovery down to a dead stop. Even the
most excellent and experienced operator probably hasn't seen a HOTIO in
many years. Our operators are trained to page the MVS oncall if there
is any doubt. And we haven't seen HOTIO either.
So even the most extreme reaction seemed better than asking the operator
to send a page and spread the confusion. Better to box and recover from
that.
Lance
----- Original Message -----
From: "Knutson, Sam" <[EMAIL PROTECTED]>
Newsgroups: bit.listserv.ibm-main
Sent: Wednesday, December 12, 2007 9:21 AM
Subject: IECIOSxx HOTIO settings
Hi,
I am reviewing our settings for HOTIO in IECIOSxx
SYS1.PARMLIB(IECIOS00) IBM default if different
HOTIO DFLT110=(OPER,OPER) BOX,BOX
HOTIO DFLT111=(CHPK,OPER) CHPX,BOX
HOTIO DFLT112=(OPER,OPER) CHPK,BOX was CHPK,OPER
HOTIO SDFT110=(OPER,OPER) BOX,BOX
HOTIO SDFT111=(CUK,OPER) CUK,BOX
HOTIO SDFT112=(CUK,OPER) CUK,BOX
IBM changed the default for DFLT112 from CHPK,OPER to CHPK,BOX in z/OS 1.8
and it prompted me to review these. I cannot remember an instance of
HOTIO in many years but I do think that OPER as the first action as we
have in many cases is probably unwise.
Curious if anyone else has changed the IBM defaults or if anyone has some
insights on what was the motivation for the change in 1.8 to DFLT112? This
specifies the recovery action to be taken for a DASD or a dynamic pathing
device that is not reserved or assigned. My guess is that IBM must have
seen some cases where OPER resulted in prompts incorrectly or not replied
to and it caused an outage.
My current thinking is to propose we at least remove OPER as the first
action in this case and possibly for all the cases.
Anyone have any comments?
Best Regards,
Sam Knutson, GEICO
Performance and Availability Management
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