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  3. September 2006

Re: First time buying System i5

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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