I would appreciate more info on this also
we run EMC dasd here also ( DMX4 ) w/ multiple LPARS
thanks
"Feller, Paul"
<pfel...@aegonusa
.com> To
Sent by: The IBM IBMVM@LISTSERV.UARK.EDU
z/VM Operating cc
System
<ib...@listserv.u Subject
ARK.EDU> Re: IPL 190 hangs in zVM 5.4 -
solved
03/30/2009 09:17
AM
Please respond to
The IBM z/VM
Operating System
<ib...@listserv.u
ARK.EDU>
If possible, could you please give a little more detail. What model of
EMC DMX and what level of microcode?
Paul Feller
AIT Mainframe Technical Support
-----Original Message-----
From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On
Behalf Of Dieltiens Geert
Sent: Monday, March 30, 2009 6:35 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: FW: IPL 190 hangs in zVM 5.4 - solved
Well, it seems that our missing interrupts were being caused by a bug in
the EMC-microcode, in combination with z/VM 5.4. Eventually, last Friday
afternoon, it did kill our production (and me too, feeling better now,
thanks).
Upgrading to the latest EMC-microcode apparantly fixed it.
But to be fair I must say this was the first time in 15+ years that the
EMC-boxes caused a serious mainframe-related problem, and EMC-support was
very quick to repair it.
If you're planning to be or already are running z/VM 5.4 on a multi-LPAR
System z with shared dasd in an EMC Symmetrix DMX, then make shure you have
that latest EMC-microcode.
Thanks,
Geert.
> ______________________________________________
> From: Dieltiens Geert
> Sent: dinsdag 24 maart 2009 18:16
> To: IBMVM@LISTSERV.UARK.EDU
> Subject: FW: IPL 190 hangs in zVM 5.4
>
> An update:
>
> This seems to be related to missing interrupts for the volume(540RES)
where the CMS IPL minidisk resides.
>
> Almost exactly 5 minutes after I issued IPL 190, the IPL came through.
Better late than never :-) But the IPL worked eventually, which is quite a
relief. I repeated the IPL a couple of times, and every time I had to wait
5 minutes.
>
> The 5 minute interval is twice our MITIME interval for DASD (2 x 2
minutes and 30 seconds). If I set MITIME to 5 seconds for volume 540RES
then I always have to wait 10 seconds before I get the CMS
IPL-headermessage after an IPL 190. That's quite a bit quicker than before
it's not like it's supposed to be.
>
> So it seems that 2 missing interrupts have to be processed before the IPL
190 continues. I still have no idea what could be causing this...
>
> Bye,
> Geert.
>
> _____________________________
> Geert Dieltiens
> Systeembeheerder
> Informatica J. Van Breda & C°
> Tel.: + 32 3 217 50 16
>
>
>
> ______________________________________________
> From: Dieltiens Geert
> Sent: dinsdag 24 maart 2009 16:35
> To: IBMVM@LISTSERV.UARK.EDU
> Subject: IPL 190 hangs in zVM 5.4
>
> Hi all,
>
> 10 days ago we activated z/VM 5.4 in production. All worked really well.
>
> But yesterday when I logged on MAINT I noticed that CMS didn't IPL. It
now seems that IPL 190 no longer works (in any VM-userid). After entering
the IPL 190 command (or just logging on to MAINT) nothing happens. From
that point on other users that issue IPL 190 or IPL CMS will hang as well.
> A LINK to a minidisk on the same volume (540RES) will hang as well. It
seems that the whole volume is being locked.
> We can solve the hang by issuing #CP IPL CMS in the machine where the IPL
190 was issued (IPL CMS still works fine). Other users can then proceed as
well.
>
> When I do an IPL 190 in user MAINT, Performance Toolkit shows this for
USER MAINT:
>
> ...
> Device activity and status:
> 0009 3215 .0 000C 254R CL *, EOF NOH
NCNT
> 000D 254P CL A, CO 01, NOH NCNT 000E 3211 CL A, CO 01, NOH
NCNT
> 0112 3390 .0 B001,RR, 65Cyl,--->0 0123 3390 .0
B03C,WR,3339Cyl,--->0
> 0124 3390 .0 B03D,WR,3339Cyl,--->0 0125 3390 .0
B03E,WR,3339Cyl,--->0
> 0190 3390 .0 B03C,WR, 107Cyl,BUSY 0191 3390 .0 B03C,WR,
175Cyl,--->0
> ...
>
> Please note that 190 is marked BUSY. It stays that way until I issue #CP
IPL CMS in user MAINT.
> I also tried an IPL 490 in user MAINT and that hangs as well.
> I copied MAINT 190 using DDR to another volume as minidisk A190 and
issued IPL A190 and that hangs as well.
> I then made this minidisk available to another VM-system, IPLed it, and
that works fine.
>
> Any ideas what's going on?
>
> Thanks,
> Geert.
>
> _____________________________
> Geert Dieltiens
> Systeembeheerder
> Informatica J. Van Breda & C°
>
>
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