I have heard this a few times now so I want to make sure I understand
this because I may reconfigure my JS12 blade in the near future.
Dr Franken, and I think Rob Berendt (many moons ago), both mentioned
virtual arms being key. I had originally configured the Blade and SAS
modules incorrectly, operating on some limited knowledge of the whole
environment by creating a physical mirrored pair for VIOS and a physical
mirrored pair for IBM i. I recently installed another Blade Center and
had a few light bulbs come on about virtual disks vs the SAS Storage
Module. I think the general approach should be that you raid together
the physical disks into a large array and then build a single large
volume and create smaller virtual disks from the larger volume as needed.
So a few questions:
I seem to recall that the recommendation for VIOS installation use two
mirrored physical disks but now I am not so sure that is necessary if
the 6 320 GB drives in the SAS cage were one volume and then two
smaller virtual disk were carved out for VIOS. Is my assumption about
physical disks for VIOS incorrect?
If I understand Rob and the good Doctor correctly, I should carve out at
least 6 virtual disks for IBM i? Then in IBM i I also create a RAID
array from those 6 disks (or is that redundant?)
I guess I never fully virtualized my thinking: The configuration of IBM
i on VIOS should mimic a physical configuration. Yes?