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Rob, i believe you did but you were talking about NPIV IIRC. In this case
we are both asking about SAS ports which are not as nice as FC (Worst part?
in my case the machine HAS 2 DualPort 8G HBAs but no FC switch so i cant do
NPIV even if the tape library had FC).

Roberto

On Thu, Sep 25, 2014 at 8:26 AM, <rob@xxxxxxxxx> wrote:

It's better than that. I use the same port from multiple lpars at the
same time! Yes, I have had three lpars doing saves simultaneously out
that same port, virtualized from vios, at the same time and got better
performance than each lpar having their own fiber card back on Power 6.
Didn't I already post this?


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: Kirk Goins <kirkgoins@xxxxxxxxx>
To: Midrange-L <midrange-l@xxxxxxxxxxxx>
Date: 09/24/2014 07:48 PM
Subject: Virtualizing Tape VIOS vs IBM 1
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



When hosting IBM i on IBM i I can place the SAS physical adapter in the
Host and using vSCSI adatpers I can setup it up and all you have to do is
Vary the Drive Off in 1 partition and Vary on in the other. I have done
this with a single drive on a single card.
Works Great and no HMC to mess with to move the tape drive.

With Power8 unless you buy something bigger than an 8core you have very
limited cards slots. I would really like to use a single SAS card with
multiple ports in different partitions at the same time. Can this be done
in VIOS and/or IBM I?

Example1: SAS Tape Card assigned to VIOS and Use Port1 for IBM i Partition
A while using Port 2 for IBM i Partition B?

Example2: Same as #1 but IBM i is the Host?

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