RE: RAID, journaling, and ASPs, oh my!

["Chris Bipes" <chris.bipes@xxxxxxxxxxxxxxx>]

I sure someone will correct me if I am wrong but the ASPs are set at the
disk level when you add them to the system.  When you add drives, you
specify the ASP.  You can then build a raid set from drives in the same
ASP.  When the system boots, the load source is stored in PROM or on
more modern system it could be on the FSP.  But I believe when the disks
spin up and report to the raid controller, they give not only the raid
configuration but the ASP as well. 


Chris Bipes
Director of I.S.
CrossCheck, Inc.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Friday, February 08, 2008 1:33 PM
To: Midrange Systems Technical Discussion
Subject: RE: RAID, journaling, and ASPs, oh my!

I totally understand what you are saying.  I just have an issue of how
that is actually implemented.
I get that if ASP1 is gone you can restore ASP1, and apply the journal
receivers from ASP2 back to the data sets on ASP1.
My question is that the restore of ASP 1 remembers the configuration,
etc of ASP2?  And, where does it store the list of objects in a library
on ASP2, in the library definition itself?  And then ...

I guess if one of the check lists in the chapter "Selecting the
appropriate recover strategy" at
http://publib.boulder.ibm.com/infocenter/systems/scope/i5os/topic/rzarm/
sc415304.pdf
covered this scenario it would increase a comfort level.