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Pete,

Try booting up in Manual mode and go into DST and WORK WITH DISK
Configuration. From there you will see what you need.

Pete

Pete Massiello
iTech Solutions
http://www.itechsol.com

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Pete Helgren
Sent: Wednesday, November 12, 2008 1:52 PM
To: Midrange Systems Technical Discussion
Subject: Mirroring on i5/OS

I thought this would be easy but I must be a little slow this week...

I have my JS12 configured with 4 drives allocated to i5/OS (More
accurately I have VIOS allocating 4 drives to the JS12 from the 6
available in the BCS). Two of which I have configured as part of
ASP1. All is well. However, I'd like to get some protection on these
drives and my understanding was that mirroring is my only option. So,
how to I achieve that ? Disk hardware status shows this:

Serial Resource Hardware
ASP Unit Number Type Model Name Status
1 1 YWEB5KZWKZRX 6B22 050 DD004 Operational
1 2 Y9EJAR7L8YMZ 6B22 050 DD003 Operational
Y384SV9UX3VE 6B22 050 DD001 Operational
YJA2X8PBPAUR 6B22 050 DD002 Operational

So, as far as I understand it, the two drives that are unallocated could
be used to mirror the other drives but I don't see any option in SST to
use these drives in a mirrored arrangement. Work with Device Parity
protection show the following menu:

1. Display disk configuration
2. Include unit in device parity protection
3. Start device parity protection - RAID 5
4. Start device parity protection - RAID 6
5. Start device parity protection - RAID 5 with hot spare
6. Start device parity protection - RAID 6 with hot spare
7. Select parity optimization

No mention of mirroring.....

So, how do I mirror these things? I get plenty of hits on mirroring
"Concepts" in the infocenter but precious little about implementation.
Running IBM i 6.1 on a JS12.

Pete




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