AIX LUN Size

From: apples (mar35ca_at_gmail.com)
Date: 10/18/05 

Date: 17 Oct 2005 17:07:53 -0700

Sorry for posting this here but I never got any feedback in the storage
group....

I have enterprise class storage (ESS800) and some lower-end fastt900
storage connected to AIX and Windows hosts.

Is there any benefit in creating smaller LUN's vs bigger LUN's when
connecting an AIX server to the ESS (or FAStT).

I was always lead to believe that the more hdisks the better since you
get more spindles and disk queues. If I create 5 LUN's or 10 LUN's from

the SAN storage then in both cases I may use the same number of
physical disks. So I'm not getting in more physical disks or spindles.
What about disk queues - I'm getting more of them when I create smaller

LUN's but I'm not really sure what (if anything) that is doing for my
performance.

Can someone explain the connection between LUN disk queues and phsical
disks - what do they really mean?

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