RE: Starting Raid on 2nd Raid Card, adding 6 disks

Before starting the RAID, in the same menu that Rob pointed out set the RAID
Parity Optimization to capacity to make the most room, or performance to
balance the striping across the disk units. If you read up on those options
you can pick the correct one for the situation.

--
Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jack Kingsley
Sent: Saturday, March 15, 2014 8:56 AM
To: Midrange Systems Technical Discussion
Subject: Re: Starting Raid on 2nd Raid Card, adding 6 disks

Rob, thanks, that makes sense, only purchased 6 drives unfortunately.


On Sat, Mar 15, 2014 at 8:08 AM, <rob@xxxxxxxxx> wrote:

If these are SCSI drives you would be better off if you started out
with 8 (or more) disks than 6.
3 drives: Raid striping is across only 2 drives. Ultimate
performance killer. Legendary. Across multiple OS's, not just IBM i.
Google 3 drive raid set.
4-7 drives: Raid striping is across 4 drives.
8 or more drives: Raid striping is across 8 drives.

Can you see the difference there?


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: Jack Kingsley <iseriesflorida@xxxxxxxxx>
To: Midrange Systems Technical Discussion <MIDRANGE-L@xxxxxxxxxxxx>
Date: 03/14/2014 08:37 PM
Subject: Starting Raid on 2nd Raid Card, adding 6 disks
Sent by: midrange-l-bounces@xxxxxxxxxxxx



Can you start raid, add drives and balance data to ASP1 with the
system up, or do you need to it in a controlled environment using
SST/DST.
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