Grand Day,
For Your Interest .....on the Vendor's matter
We were running a PMR as Alan suggested and it was jogging along
quite well until Saturday.. On Saturday we switched from a z890 to a
z9-BC and our issue with QIOASSIST went away. So if you have a z890 and
issue with QIOASSIST, switch from an Hitachi to a IBM, in our case a
z9-BC. We have updated the PMR...
Regards,
Dick Waite
Senior Consultant,
Technical Marketing Manager Adabas,
Software AG,
64297 Darmstadt, Germany
Phone: +49 (0) 6151 921505
Mobile: +49 (0) 176 15 921505
Email:<mailto:[EMAIL PROTECTED]>
-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Alan Altmark
Sent: 21 August 2006 22:55
To: [email protected]
Subject: Re: Vendor's Matter
On Saturday, 08/19/2006 at 08:20 ZE2, "Waite, Dick"
<[EMAIL PROTECTED]> wrote:
> I would agree with Marcy, vendor's matter. We switched last weekend
> from z/VM 5.1 to 5.2 and all my Linux machines running SuSE SLE 10.0
> stopped working (I/O errors). They are all SCSI attached. You might
> remember my post. Well we do NOT have IBM SCSI and so far we are still
> running with the bypass of switching of QIOASSIST. I'm told by wise
> people that this is working grand on IBM SCSI...
The QDIO Assist has nothing to do with the type of SCSI device (and, by
inference, the SCSI payload). Instead, it deals with the structures
that manage the payloads. So, this means that there is a relationship
between the way the device driver creates said structures and the
hardware itself (in the form of the assist). Further, CP has to create
inputs that allow the assist to work.
If you changed only z/VM, and turning off the assist gets everything
working again, then there are only two possibilities:
1. The assist itself is broken
2. CP's management of the assist is broken
Use of non-IBM devices may result in changes to the timing of events,
surfacing defects not previously observed. Either way, the correct
response to the issue is a PMR. (And I think one has been opened.)
Alan Altmark
z/VM Development
IBM Endicott
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