RE: LPAR Question -- MIDRANGE-L





We sell a lot of systems, and many start out sharing a tape drive, but
eventually every partition seems to get it's own tape drives.  3580
technology (which is fast enough for all but the very largest of systems)
is inexpensive enough for customers to deploy them to each partition.

There's a funny thing about tape drives.  People want to use them at the
same time of the day to do their backups.  Particularly, if you're going to
have to run another shift to get that backup done, then avoiding that shift
with more hardware makes good business sense.

It's practical to share DVD's, because you don't tend to use them often.

Al

Al Barsa, Jr.
Barsa Consulting Group, LLC

400>390

914-251-1234
914-251-9406 fax

http://www.barsaconsulting.com
http://www.taatool.com



                                                                           
             "Chuck Lewis"                                                 
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That's how we are. Three partitions/ Three DVD drives. Three NIC cards...
Share the tape unit.

Chuck


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Andy Nolen-Parkhouse
Sent: Thursday, November 13, 2003 1:44 PM
To: 'Midrange Systems Technical Discussion'
Subject: RE: LPAR Question

Mark,

Yes, you dedicate individual disk controllers, and their associated drives,
to individual partitions.

My recollection is that the base optical drive will be driven by the MFIOP
on your machine, which cannot be shared between partitions.  So yes, you
would need a second optical drive.  Once you have this second drive on its
own controller, this could be shared between partitions.

You will be able to move around your processor power and your memory
dynamically.  Some of your hardware, like a tape drive on a dedicated IOP
can be varied down in one partition and made available to another
partition.
Each partition would require its own NIC.

Some documentation is available at:

http://www-1.ibm.com/servers/eserver/iseries/lpar/

Regards,
Andy

> If all of those things you mentioned need to be done, then I would
> definitely go the BP route.  What I was getting at, is that I do not
think
> I have any special hardware requirements, unless I cannot share the CD
> drive easily between the partitions.  I do not care about having backup
> for both partitions.  I just want to be able to do something like create
a
> second partition and tell it to use xx GB of DASD, xx MB of RAM and xx%
of
> CPU.
>
> Do I have to dedicate disk by partition?  I was assuming I could just
draw
> from a common pool of disks?
>
> Thanks, it sounds like we will go with a BP.  We already have a list of
> local BP's with experience at LPAR configs.
>
> Mark




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