IBM Power 550 Technical Overview

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Readers' comments (4) 

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Posted by Mr. Hans Staal on 14 May 2008 at 7:14

There seems te be a discrepanty in the memory placement rules with: Power Systems Memory Modules (SA76-0154-02)
According to the Technical Overview only 2, 4 or 8 DIMMS are allowed.
According to SA76-0154-02 (table 2) it is also possible to place 6 DIMMS
Who is to believe?

Posted by Scott Vetter on 17 July 2008 at 15:40

Thanks for your comment. The sales manual, and the Redbook agree, or as follows: Memory must be installed in groups of 1 feature (2 DIMMs), 2 features (4 DIMMs), or 4 features (8 DIMMs) per processor card. Installation of 3 features (6 DIMMs) is not permitted.

I'll try to locate that publication and its owner and reconcile.

Posted by Rudolf Frei on 23 October 2009 at 10:08

on page 14 we can read: "#8345 is the optional, higher
function DASD backplane with an external SAS port. It provides dual paths from the SAS controller to each internal disk drive using SAS expanders. This option, along with #5679,
provides for internal RAID levels 0, 5, 6, and 10."
Shouldn't the #8345 be replaced with #8346?

Posted by Scott Vetter on 2 December 2009 at 10:22

I've updated the 520 and 550 paper with the correct backplane feature code. Thanks!


Publish Date
26 May 2009

Last Update
21 April 2010

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