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  3. December 2017

Re: Migrating extant system to new hardware

Ok, so it sounds like in the end what I want to do is to save everything on
tape, install the same level OS on the target box, and do a restore from
physical tape.

Is there anything I should *omit* from the restore because these are two
different p-series boxes? Will my device setup be screwed up? (Aside from
changing IP address)?

On Wed, Dec 20, 2017 at 10:52 AM, Rob Berendt <rob@xxxxxxxxx> wrote:

Jack,

For example, certain tape libraries are incapable of being IPL'd from. You
IPL from DVD. But you do not install one thing from the DVD. You install
from your alternate installation device.
I "think" the OS must be the same. So you can't IPL from a 7.3 DVD and
use 7.1 tape in your alternate installation device. In fact, I think I've
been burned by this.
Probably another good reason to keep a recent resave of your OS on
physical media. Might as well leave it in your DVD drive. I just may do
that next time I go the the remote DC.


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
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From: Jack Woehr <jwoehr@xxxxxxxxxxxxxxxxxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 12/20/2017 12:38 PM
Subject: Re: Migrating extant system to new hardware
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>




Again: "alternate IPL device" vs "alternate installation device".
Would that make a difference?


My head hurtz ... :)

On Wed, Dec 20, 2017 at 10:31 AM, Rob Berendt <rob@xxxxxxxxx> wrote:

Again: "alternate IPL device" vs "alternate installation device".
Would that make a difference?


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: DrFranken <midrange@xxxxxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>,
Rob Berendt <rob@xxxxxxxxx>
Date: 12/20/2017 11:47 AM
Subject: Re: Migrating extant system to new hardware
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



I have never hit a limit of virtual optical total capacity of the image
catalog and I have migrated multi-TB systems this way.

The biggest thing is having enough disk space.

The second is enough network to push it all.

The third is a place to boot the new system from whether that is an
image catalog on VIOS, a network based catalog on the existing system,
or a physical disk. DO NOTE I have seen in this thread references to
'far far away' and if you are trying to IPL from the network to install
IBM i LIC using TFTP/NFS that is across the country that will with high
probability fail across a WAN. It IS sensitive to latency. I do it
across the state of MI but that's on dedicated private fiber with 4ms
latency, It sometimes fails over the link to my home office with a 15ms
latency. So be warned.

- Larry "DrFranken" Bolhuis

www.Frankeni.com
www.iDevCloud.com - Personal Development IBM i timeshare service.
www.iInTheCloud.com - Commercial IBM i Cloud Hosting.

On 12/20/2017 11:01 AM, Rob Berendt wrote:
<snip>
I have not researched inherent limit of virtual optical but I do like
that
idea of backing everything
up and transmitting an image then installing raw from the image. I've
never done that, but it really works?
Again, is there a limit to the size of the virt opt image?
</snip>

It's pretty darn big if there is a limit.
Keep in mind that virtual optical is an "image catalog". Very
important
term.
Each "image catalog" has multiple "image catalog entries".
I have one image catalog composed of 6 image catalog entries. Each
entry
is between 1-4GB. This is just the latest PTF cume and groups.
Name Size
CUME_1.bin 4,145,152K
CUME_4.bin 3,801,088K
CUME_5.bin 3,784,704K
CUME_3.bin 3,407,872K
CUME_6.bin 2,048,000K
CUME_2.bin 1,392,640K
I've done OS upgrades with a LOT more entries.

I think there's a limit of 1TB on each image catalog entry.

https://www.ibm.com/support/knowledgecenter/en/ssw_ibm_i_
73/rzamp/rzampother.htm

You might want to verify that for 7.1. Just change the dropdown on
the
left.

Rob Berendt

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