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Method and Apparatus to automatically correlate IO drawers to CECs in an ambiguous power control environment

IP.com Disclosure Number: IPCOM000183352D
Original Publication Date: 2009-May-19
Included in the Prior Art Database: 2009-May-19
Document File: 1 page(s) / 24K

Publishing Venue

IBM

Abstract

Described is a method and apparatus to automatically correlate IO drawers to CECs in an ambiguous power control environment.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 80% of the total text.

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In an ambiguous power control environment (e.g., an ethernet cluster or a 24'' power control environment), a method is required to determine which IO drawers belong to which CECs from a power control and service network standpoint. One solution to this problem is to have a separate cable running from each CEC to each IO drawer. Or a point-to-point power control network, which would also involve separate cabling, can be developed which would determine the CEC to IO relationships. Another solution would be to have a table of IP addresses (or names of some sort) that describe the CEC to IO relationships.

    This method involves a preliminary procedure (genesis IPL) where the IO drawers are powered on externally and the CEC to IO power control ownership is determined via system bus ownership. The advantages of this method over a manually entered table are that it is far less effort for the customer and it is not prone to user input error. The advantages of this method over the separate cable solutions is that it requires less hardware and is far cheaper.

    This method involves a preliminary procedure (genesis IPL) which involves powering on the IO towers from an external source. This is done automatically when AC is applied, manually, or from a separate console (e.g., laptop). The CECs are then powered on as they normally would be. The CECs walk the system bus and find the IO drawers that they ow...