Re: Hosting an IBM i partition - storage issues

Not sure on your hardware setup, sounds like you would either want 1 NWSD
and additional storage spaces assigned to it with different sequence numbers
or multiple NWSD's with different controllers and attached storage spaces.
Not sure on the disk size limitations. I am not sure what VIOS would give
you unless you have alternative avenues to disk storage through it like (SAN
etc) other than your current hardware disk limits.


On Tue, May 10, 2011 at 3:20 PM, Adam Driver <ADriver@xxxxxxxxxxxx> wrote:

Hi Everyone,

I'm having some mainly storage related issues hosting one IBM i partition
on another.

Firstly, the storage requirements are very large, we're looking at needing
4TB+ (the hosting partition is just under 12TB). I've heard there is a limit
of 1TB for a hosted partition, but I have managed to create one network
server description with 7 storage spaces attached for a total of about
1.4TB. So far so good, the partition comes up and I've been able to install
LIC and OS.

However, trying to get around any potential size limits, I tried creating
multiple server descriptions for the same partition. So, I have another NWSD
identical to the first (except it has RSTDDEVRSC(*ALLOPT) as suggested by
the Logical Partitioning Redbook), also with 7 storage spaces. We'd still
need to add more but I'm just trying to prove it works at the moment.
Anyway, when I try and vary them on, the first NWSD works and starts the
partition. The second fails with the message " Server already varied on for
partition."

So, a couple of questions:


1) Is there something I'm missing in getting both NWSDs to work? The
Redbook certainly suggests having more than one NWSD for a partition is
possible.

2) I've already gone past the 1TB I'd heard was the limit, but is
anyone aware if there is indeed an upper limit? (This partition was actually
previously working at 2TB+ with one NWSD, but we broke it trying to increase
the size).

3) Am I wasting my time and would it better to save off the hosting
partition to tape and reconfigure all that disk in a VIOS server to host
both partitions (actually three, there's another smaller hosted test
partition that's working perfectly)?

Also, in case anyone asks, we do not have the available slots or
controllers to configure this large partition as a physical partition, and
purchasing hardware just at the moment is not an option.

Any help greatly appreciated!

Thanks

Adam Driver
IBM Certified Systems Administrator - System i
Consultant - Infrastructure Technician
Exacta Corporation
608.661.6697 ext 2581
adriver@xxxxxxxxxxxx<mailto:adriver@xxxxxxxxxxxx>
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