Re: performance of internal vs san for 7TB

Jim,

Without knowing the limits placed on internal vs. SAN disk at the DR site,
I'm not sure how to approach your question. That said, SAN vs. Internal
disk should perform nearly the same assuming the SAN is set up properly and
the zoning is correct on the SAN switch. Without further information I'd
go
with the large partition on SAN and the smaller one on internal storage.
Truthfully the SAN disk may outperform the internal disk depending on
spindle sizes, types of controllers, etc. In the end if it's a DR test,
and
the system is recovered and comes up, that's what counts, is it not?

--
Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jim
Franz
Sent: Tuesday, June 02, 2015 8:35 AM
To: Midrange Systems Technical Discussion
Subject: performance of internal vs san for 7TB

We run a Power 7+ with 2 lpars, one is 1.4TB and other is 6.4TB, all
internal disks (19A1 - 236GB).
Our DR provider needs to split that into internal and SAN disk (all at
remote data center). How to confirm performance will be similar (or at
least
acceptable)? What to ask and verify? Must confirm acceptable configuration
before annual test.
(switching providers is not an option)

Jim Franz
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