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Automatic mapping of worldwide names to physical locations using fault indicators Disclosure Number: IPCOM000019896D
Original Publication Date: 2003-Oct-08
Included in the Prior Art Database: 2003-Oct-08

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In a computer system with devices that are each identified by a unique WorldWide Name (WWN), it is often useful to be able to identify those devices by a secondary mechanism. This is important in fault-tolerant systems, in circumstances where the primary data path may have failed. In this article we describe how this can be achieved by pulsing the LED indicator of a disk-drive, or similar device, to determine its physical location. No human intervention is required because the state of LED is read back electronically.