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Method to exchange the cache battery on an adapter without powering down the adapter

IP.com Disclosure Number: IPCOM000173479D
Original Publication Date: 2008-Aug-08
Included in the Prior Art Database: 2008-Aug-08
Document File: 3 page(s) / 159K

Publishing Venue

IBM

Abstract

Disclosed is the method to exchange the cache battery of an adapter (i.e. RAID adapter) without shutting down the adapter. To do so, the cache battery must be exchangeable without removing or powering off the adapter. This way, there is no downtime for the adapter, the computer or the OS.

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Method to exchange the cache battery on an adapter without powering down the adapter

Many adapters (like PCI/PCI-Express RAID adapters) that are used in computers today have cache batteries which must be replaced in a regular interval (max. battery lifetime). This ensures the functionality of caching information when there is no power applied to the adapter. Today, this is only possible by shutting down the adapter (or the complete computer and operating system (OS) if the adapter is not hot-pluggable), removing the adapter and then replacing the battery. This means a downtime of the adapter (or even the whole computer). The ability to exchange the cache battery without powering down the adapter eliminates all these problems.

By having the ability to exchange the cache battery without powering down the adapter, the adapter remains available to the computer, and the cache battery can be replaced without interrupting the normal operation of the computer and the operating system.

Should the cache battery be removed and not reinserted, the adapter will continuously report this in the event log (

just as if the cache battery were defect in

the adapters used today). This way, it is ensured that the absence of the battery is detected and reported.

The cache battery controller on the adapter must support the ability to exchange the cache battery on the...