Hello Randy,
I have VARIED the path and then the CHPID, leaving one
available.
We had 6 chpids at TELXON but that was an EMC system back in 2000.
We did 5 chpids, upgraded, varied back online. Then did the
last
CHPID. Seems to me that the problem is the open systems don't keep
track
of where you are in your I/O. They issue a retry when they don't work
but it is a manual retry (typically).
IBM expects responses and it must be from the correct path.
If you drop all paths/chpids, you have lost your system.
Ed Martin
Aultman Health Foundation
330-588-4723
[EMAIL PROTECTED]
ext. 40441
>> -----Original Message-----
>> From: VM/ESA and z/VM Discussions [mailto:[EMAIL PROTECTED]
On
>> Behalf Of Neubert, Kevin (DIS)
>> Sent: Tuesday, January 24, 2006 10:20 AM
>> To: [email protected]
>> Subject: Re: Varying CHPID offline
>>
>> I'm not a big fan of using any command with FORCE as my first
command.
>> If
>> the upgrade consists of the CHPIDs being upgraded one at a time I
would
>> start with VARY OFFLINE PATH nn ALL then VARY OFFLINE CHPID nn.
After
>> the
>> upgrade vary the CHPID and PATH online then upgrade your next CHPID.
>>
>> Depending on your I/O configuration via Q CHPID nn you might want to
note
>> what devices are online to each path prior to varying the path
offline so
>> you know what devices are supposed to be accessible when you vary the
>> path
>> back online.
>>
>> Regards,
>>
>> Kevin
>>
>> -----Original Message-----
>> From: VM/ESA and z/VM Discussions [mailto:[EMAIL PROTECTED]
On
>> Behalf Of Randy Dray
>> Sent: Tuesday, January 24, 2006 5:01 AM
>> To: [email protected]
>> Subject: Varying CHPID offline
>>
>> Last night we had IBM upgrade the code on our 800ESS
>> Shark.
>>
>>
>> The statement was this would not be a service
>> impacting upgrade.
>>
>> all the CHPIDs upgrade fine for our open systems stuff
>> but when we got to all my VM CHPIDs VM crashed.
>>
>> I am looking for a way to vary offline the CHPIDs that
>> that we need to upgrade.
>>
>>
>> CHPID 14, is host bay 1
>> CHPID 15, is host bay 2
>> CHPID 16, is host bay 3
>> CHPID 17, is host bay 4
>>
>> IBM said that he thought the operating system zVM 4.4
>> should have been smart enough to switch over due to
>> the multiple paths into the system.
>>
>> QUESTION: Can I issue a Vary OFFLINE CHPID nn Force,
>> then will it automatically switch over to another
>> chpid. When all the maintanance is done, Vary ONLINE
>> CHPID NN to get it back.
>>
>> Thanks
>>
>> Randy Dray
>> Systems Programmer
>> Morton Buildings Inc.
>>
>> Morton IL
>>
>> (309) 263-6397
>>
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