Re: [very long] Moving from physical FC adapter to VIOS (was: Re: VTLs and backup time)

Le 30/08/2022 à 09:35, Laurence Chiu a écrit :

Exactly.

But that raises an interesting point. Everything is on the SAN and the LUNs
are all replicated from production to DR. So in DR we can spin up the DR
instance off the replicated LUNs and with only some minor configuration
changes during startup to alter the host IP addresses to be in the DR
server network subnet it all comes up.

Now if the VIOS is on the SAN what would happen when that LUN was
replicated to the DR site and that replicated LUN was defined as the load
source? Or is the VIO configuration separate from the load source?

VIOS disks retain AIX operating system and VIOS setup. They are completely distinct than client partitions volumes. Even if they reside on your external storage box, they are distinct volumes. And, on top of that, in your DR setup, VIOS residing on the DR side is *not* used as DR for VIOS residing on the production side. VIOS are closely tighted to the server hardware and are not replicated. You can consider them as an extension of the server's firmware (indeed, they are part of PowerVM solution just like the server's hypervisor PHYP). So, in your target setup with VIOS, you will have dual (for local redundancy) VIOS on each server. And all the 4 VIOS must be up and running, updated, backed up, maintained, just like production partitions. VIOS must be running for the client partitions to work.

On Tue, Aug 30, 2022 at 3:53 AM Rob Berendt <rob@xxxxxxxxx> wrote:

Especially since the OP is already using SAN

Rob Berendt
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Larry "DrFranken" Bolhuis
Sent: Monday, August 29, 2022 11:38 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>;
Marco Facchinetti <marco.facchinetti@xxxxxxxxx>
Subject: Re: [very long] Moving from physical FC adapter to VIOS (was: Re:
VTLs and backup time)

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On 8/29/2022 11:25 AM, Marco Facchinetti wrote:

The biggest debate will be internal or external disks for your IBM i.

Ahh yes, however when presented the list of capabilities provided by SAN
that internal disk will never do, the majority of my customers go SAN.

Internal disk DOES have it's place but that place is shrinking daily!

- DrF

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