As you pointed out in an earlier post you will need "same" (thinking you
meant SAN there) switches. Easy enough but even used, they can get

Jim Oberholtzer
Agile Technology Architects

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Rob
Sent: Thursday, January 30, 2020 6:55 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: VTL - Fiber vs SAS

LIBRARY is the way to go! Not DRIVES.

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

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
Sent: Wednesday, January 29, 2020 6:04 PM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: VTL - Fiber vs SAS

CAUTION: This email originated from outside of the organization. Do not
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See my earlier response.

With i Hosting i you can virtualize TAPE DRIVES both SAS and Fiber.

With VIOS Hosting you can virtualize TAPE LIBRARIES if they are FIBER.

This is a KEY question we discuss with customers when designing a
system. i Hosting i is a great solution BUT it does have limitations.
One of those is tape virtualization.

To make the VTL visible AS A LIBRARY by multiple LPARS you have two choices.

a) Install multiple SAS or FIBER cards and allocate one to each

b) Install VIOS and a single FIBER card and connect the VTL to an
Capable fiber switch and the VTL will be available to each partition.

- Larry "DrFranken" Bolhuis - Personal Development IBM i timeshare service. - Commercial IBM i Cloud Hosting.

On 1/29/2020 3:37 PM, Kevin Monceaux wrote:
On Wed, Jan 29, 2020 at 09:07:45PM +0100, Holger Scherer wrote:

The question fiber or SAS is more to be lead by the question, if you want
to share the VTL with other servers / LPARs, or if you want to have the
VTL in a different room, which is easily possible using fiber.

Both connections should not be affected by the rather slow SAS cards.

The VTL will be in the same rack as our 8286. We would like to be usable
more than one LPAR at a time.

We currently only have two 57B3 SAS cards. We DLPAR them with only one
using our physical tape library at a time. That's proved to be
at times. I've heard that with i hosting i the host LPAR could virtualize
the library, but with our TS3100 and SAS cards it would only be usable in
serial mode.

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