To follow on with Roberto's comments:
If you are doing dual VIO then you are almost certainly doing SAN disk.
So you wouldn't need ANY RAID cards. At most perhaps a SAS card for tape
If you are doing internal disk (such as the 18 drives plus EXP24S you
suggest) then you're almost certainly don't need VIOS.
So unless I have missed something then there really isn't a real issue here.
Am I wrong?
- Larry "DrFranken" Bolhuis
On 6/21/2014 12:41 PM, Roberto José Etcheverry Romero wrote:
Is there a No-Cache SAS controller for P8? i'm more of the "Get the 2 disks
for the VIOS and maybe the image catalogs and just get the rest on SAN
storage" method, i've never seen the need to have high performance cards
driving VIOS. It's been pointed out to me that some DO use VIOS to host the
disk instead of using SAN but i doubt that in case of Dual VIOS you would
be doing that...
On Sat, Jun 21, 2014 at 12:49 PM, Kirk Goins <kirkgoins@xxxxxxxxx> wrote:
VIOS just got a lot more expensive to do right unless I am missing I am
IBM ( at least in the past ) has recommended Dual VIOS servers and when
talking to support they are amazed if you are not. So on Power7 say a
6 drive Split Backplane $800 ( mirror VIOS drives ) Approx $800 US List
Pair of 5805 SAS Raid Controllers Approx $4,400 US List
Total with disks, cables etc.Approx $5,200 US List
Power8 Config say S814 6Core
18 Drive backplane with Dual raid controllers with a nice level of cache.
Can attached say at EXP24S and fill the 18 internal slots ( but can't
really do DUAL VIOS as IBM recommends ) $4,000 Very good Bang for the Buck
HW wise )
6+6 Backplane with dual controllers suitable to run VIOS ( EJ0N w/EJ0S )
Approx $2,000 US List ( Very Reasonable )
The Only External SAS Raid controllers with Cache (12GB ) are $14,000 a
pair. Now I understand That is a pair of High Perf. Controllers. But if you
don't need to hang 96HDDs, Heck I have had good performance with a lot of
systems with the 5805 Controllers with up to 48drives ( you mileagel may
So on a E4D 6core to do VIOS as recommended is about $5,200 for disk
controllers and slots for VIOS on a S814 6Core the it's about $16,000.
IBM Please consider a FC5805 type SAS Controllers in that $4,400 price
6 drive Split Backplane $800 (
Pair of 5805 SAS Raid Controllers $4,400
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