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We currently have an 820 with 52 17GB drives installed, and have noticed no
performance degradation. We also have a 720, and a 620 with a mixture of 8.58GB
and 4GB drives, and have to rebalance about once a week, usually during IPL.

*********************************************
Dave Murk
System Administrator II - AS400
Metris DataCenter - Scottsdale
Desk    480.375.4261
Pager   888.337.5580
Cell    612.963.4241


____________________Reply Separator____________________
Subject:    Re: 17 GB Disk Drives 
Author: <MIDRANGE-L@midrange.com>
Date:       5/16/01 4:46 PM

Phil,

In my experience I have found that smaller drives (such as 8GB) perform
better in highly interactive environments, while the larger drives (such as
17GB) perform better in more batch oriented environments.  For example, I
have had better luck with the 17 GB drives in data warehousing applications.
Of course the 17 GB drives are more economical, especially if it means that
you don't have to purchase an expansion unit.  I do not have experience with
a mixture of drives of substantially different sizes (e.g. 4GB and 17GB).

Chuck

----- Original Message -----
From: <prumschlag@phdinc.com>
To: <MIDRANGE-L@midrange.com>
Sent: Wednesday, May 16, 2001 3:51 PM
Subject: 17 GB Disk Drives


>
>
> Does anyone have any experience with the 17 GB disk drives?  Are there
> performance issues compared to using more drives with smaller capacity?
Are
> there load balancing (% Used as well as % Busy) issues if you mix 4GB /
8GB / 17
> GB drives on the same box?  What if you keep the different types in
separate
> ASP's?
>
> If there are documents or guidelines in this area, I have not been able to
> locate them.
>
> Phil
>
>
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