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Sun Fire [TM] SF4800/SF4810/SF6800 - E4900/E6900 Platforms: discussion of RTU/RTS Behavior and Related Power Issues (Doc ID 1589906.1)

Last updated on JULY 02, 2023

Applies to:

Sun Fire E4900 Server - Version All Versions to All Versions [Release All Releases]
Sun Fire E6900 Server - Version All Versions to All Versions [Release All Releases]
Sun Fire 6800 Server - Version All Versions to All Versions [Release All Releases]
Sun Fire 4800 Server - Version All Versions to All Versions [Release All Releases]
Sun SPARC Sun OS

Purpose

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The purpose of this document is to familiarise support engineers with the inner workings of the power grids within a Sun Fire [TM] SF4800/SF6800/E4900/E6900 rack in order to assist in troubleshooting an observed power issue. It will focus on power grids in general, and the RTU enclosure in particular. Along the way, we will mention the AC Input Boxes, the Rack Fan Trays, the Frame Manager, Power Centerplane, and various internal breakers and switches that are capable of shutting off power to specific areas in the rack, including to any installed disk arrays such as a D240. An astute engineer with knowledge of the power layout within the rack will quickly home in on the cause of any sectioned power losses. Such sectioned power losses could occur within the Sun Fire [TM] SF4800/SF6800/E4900/E6900 chassis which contains the main circuit boards of the server, or outside the chassis but within the rack (peripheral trays, etc).

 

Troubleshooting Steps

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