Rex,
CIU = Customer Initiated Upgrade
Customer Initiated Upgrade (CIU) is the capability for the z990 (and I imagine 
a z900) user to initiate a permanent upgrade for CPs, ICFs, IFLs, zAAPs, and/or 
memory via the Web, using IBM Resource Link. CIU is similar to CUoD, but the 
capacity growth can be added by the customer. The customer also has the ability 
to unassign previously purchased CPs and IFLs processors via CIU.
CIU requires the CIU Enablement feature (FC 9898) installed.
Bob Richards
VP, Enterprise Technologist
Enterprise Technology Infrastructure
SunTrust Banks, Inc.
(404) 575-2798 

Seeing beyond money (sm)
-----Original Message-----
From:   IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED]  On Behalf Of 
Pommier, Rex R.
Sent:   Friday, March 24, 2006 12:20 PM
To:     IBM-MAIN@BAMA.UA.EDU
Subject:        Re: z900 "Capacity Models"?

According to the following book, there are 3 lines in the z900 series.
The 101-109 have a book that contains 12 PUs, of which up to 9 can be
normal processors (CP's).  Even though IBM doesn't spell it out this
way, the 1C1 thru 1C9 and the 110-116 actually form a single line or
processors, having a book that contains 20 PU's of which up to 16 can be
CP's.  These machines have the same clock speed as the 101-109 line.
The turbo line, which is the 2C1-2C9 and 210-216 models also have the 20
PU book, again with up to 16 MP's in the box.  The clock speed on this
line is faster than the other 2 lines (hence the turbo definition).
According to the book, any of the three lines can be upgraded within the
line by using CUoD or CIU (whatever that is).  

Based on the above, my guess is that the "capacity" models simply mean
they have the 20 PU book rather than the 12 PU book, thus allowing more
capacity within the same box without any kind of hardware upgrade.

http://www-03.ibm.com/servers/eserver/zseries/library/refguides/pdf/g326
3092.pdf 
  
  
  
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