Re: First time buying System i5

[Glenn Ericson <Glenn-Ericson@xxxxxxx>]

Tom ,
 so we can put this in proper perspective,  what prior systems has 
Power Tech placed in each LPAR?
Not sure  what  throughput stress  testing  application for  security
3 drive  RAID sets might be  fine for lite workloads. That 4th drive 
makes tons of  difference.

        Glenn

At 04:39 PM 9/26/2006, Tom Liotta wrote:
> albartell wrote:
> > Based on comments from this group I called back IBM and worked through what
> > I think I will need for a configuration.  One area that I was surprised at,
> > that is going to cost a boat load of money more, is that each LPAR needs to
> > have it's own exclusive HD's.  So for a 3 LPAR machine I would need a
> > minimum of 9 35GB HD's (optimally 12 so each LPAR could have 4 each).  That
> > means for HD's alone the cost is $14,388 (ouch).  Note though that memory
> > can be shared across LPARS.
>
> Al:
>
> It's possible that you will have no problem with 3-drive RAID sets.
> If you aren't doing major database stuff, you possibly won't notice
> it. We're running 3-drive RAID sets on a 4-LPAR 520 and it screams
> (compared to the 270 and a couple other systems it replaced, all
> with quite a few more drives).
>
> But we're a software house. We aren't running "applications" as such.
>
> Now, running a full Product Build, where 100s of objects are being
> created and many programs run through full optimization, still puts
> quite a load on. But the throughput improvement is still in the
> range of 3000%.
>
> It can depend on your workload.
>
>
> Tom Liotta
>
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