Since I am a new to the VM world and have not had a lot of hands on 
experience, this may come across as a dumb question. 

How would one go about re-labeling VM system volumes if you are using 
DIRMAINT?


Joseph Di Pippo
Operating Systems Programmer III
FRIT Computing Services
Hardware Support
1-201-531-3820




Bill Munson <william.mun...@bbh.com> 
Sent by: The IBM z/VM Operating System <IBMVM@LISTSERV.UARK.EDU>
01/30/2009 10:46 AM
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Re: Re-labeling CP-Owned volumes on a live system







our naming is VM1res, VM1w01, VM1pg1, VM1sp1 - VM2res,, VM2w01, etc - 
VM3res, VM3w01, etc  for the 3 VM lpars we have 


Bill Munson
Brown Brothers Harriman
Sr. z/VM Systems Programmer
201-418-7588

President MVMUA
http://www2.marist.edu/~mvmua/




"James Stracka (DHL US)" <james.stra...@dhl.com> 
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01/30/2009 10:40 AM 

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Same with me.  The IBM supplied volsers never lasted for more than the few 
hours doing the installs.  By end of day they were VMsomething. 
  



From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On 
Behalf Of Mike Walter
Sent: Friday, January 30, 2009 8:34 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Re-labeling CP-Owned volumes on a live system 
  

When?  Well... I've been installing VM since VM/370 Release 5 and there 
was never a requirement to use ONLY the IBM supplied volsers for anything. 


When I arrived at Hewitt Associates to install VM in 1984, I was told in 
no uncertain terms that ALL VM DASD volsers  MUST be labeled beginning 
with "VM", as in with VMxxxx.  Over time, they have relented, permitting 
them to begin with just "V".   

You just need to take extra steps during the installation process, steps 
which are not documented as part of that installation process.  It's all 
part of the learning curve, and good for your career .  If it was too 
easy, everyone would do it!  ;-) 

Mike Walter 
Hewitt Associates 
Any opinions expressed herein are mine alone and do not necessarily 
represent the opinions or policies of Hewitt Associates. 


"Quay, Jonathan (IHG)" <jonathan.q...@ihg.com> 

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01/30/2009 09:26 AM 


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Which leads to a couple of questions.  First, when did IBM start
supporting RES packs with volsers other than the standard ones as
delivered?  I seem to remember warnings about not changing them, but may
have missed when that became ok. Second, if one's intent is to run
nearly identical "cloned" VM images across some number of LPARS on some
number of CECs, would there be a simple way to do this from one Master
read-only RES pack containing various CPLOAD modules and system
configuration files, sort of like our z/OS brethren do? 

-----Original Message-----
From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On
Behalf Of Alan Altmark
Sent: Friday, January 30, 2009 10:06 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Re-labeling CP-Owned volumes on a live system

On Friday, 01/30/2009 at 09:29 EST, Kris Buelens
<kris.buel...@gmail.com> 
wrote:
> I really prefer unique volsers. 

I know I ranted on this issue recently, but it needs to be more than a 
'preference'.  z/VM is designed to run in an environment with UNIQUE 
volsers (PAV aliases are not of concern since CP understands the 
relationship).  If you don't have unique volsers, then YOU are
responsible 
for system and data integrity.

This means you need to understand the implications of a copy or restore 
operation (whether DDR or FLASHCOPY) and of giving a guest access to
real 
cylinder zero.  You must take precautions to ensure that such volumes
are 
never seen or felt by CP except at your explicit discretion.  Always 
assume that your system will restart at the worst possible moment or
that 
there may be a coup d'machine and someone else may take charge of the
I/O 
subsystem. (DR, anyone?)  And, of course, we know that Other People make

mistakes!  :-)

Alan Altmark
z/VM Development
IBM Endicott




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