Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition | |||
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Solution Type Technical Instruction Sure Solution 1017469.1 : NVRAM replacement behavior on a Sun Enterprise[TM] E3X00 - Sun Enterprise[TM] E6X00
PreviouslyPublishedAs 228583
Applies to:Sun Enterprise 3000-6000 PCI I/O BoardSun Enterprise 3000 Server Sun Enterprise 3500 Server Sun Enterprise 4000 Server Sun Enterprise 4500 Server All Platforms GoalDescriptionSun Enterprise 3x00-6x00 NVRAM/TOD (Time Of Day) chip information. This document describes the functions of the NVRAM/TOD (Time Of Day) chip in a Sun Enterprise[TM] 3X00 - Sun Enterprise[TM] 6X00 system. It describes when it is needed to be replaced, what to expect during replacement, and how to copy idprom information from one TOD chip to another within the system. SolutionSteps to FollowBackground information on the NVRAM or TOD Chip: The component itself is a "M48T59 NVRAM" chip (pn 100-4007) and is located on the Clock Board and all I/O Boards in a Sun Enterprise 3X00-6X00 system. The component is actually a battery plus seeprom. It is commonly called any one of several terms:
The chip contains the following information:
How it functions: Copies of this data reside on the Clock and all I/O Boards for redundancy. During the POST process, the NVRAM on the Clock Board is compared to the NVRAM(s) on the I/O Board(s). If the data on the Clock Board matches the data on at least one I/O Board, the data on the Clock Board is automatically synchronized to all I/O Boards. In systems with only one I/O Board, it is important to follow the Clock Board replacement procedure correctly to retain the data located on the NVRAM chip. If the data is not retained, the hostid will change which will cause problems with software that uses hostid-based licensing. If the Clock Board cannot find one I/O Board with matching NVRAM information when POST completes, the following message will be displayed: Clock TOD does not match TOD on any IO boards This message refers to the TOD chip, not the time of day value. To rectify this, the NVRAM data needs to be copied. Two OBP commands perform the copy function of NVRAM information:
These commands only mention "tod"; this refers to the chip, not the time of day value. The copy-clock-tod-to-io-boards command copies the data from the Clock Board to all I/O Boards. The copy-io-board-tod-to-clock-tod command copies the data from the I/O Board specified (in hex) to the Clock Board. The following scenarios explain how to copy the NVRAM/TOD data based on the part replacement performed: 1. When an I/O Board is replaced in a system with more than one I/O Board, the Clock Board will overwrite the TOD NVRAM on the new I/O Board so it is in sync with the rest of the system. 2. When an I/O board is replaced in a system with one I/O board,the Clock TOD does not match TOD on any IO boards error is always displayed. 3. When replacing a clock board, it is advantageous to copy theNVRAM information from an existing I/O Board to the Clock Board using the copy-io-board-tod-to-clock-tod command. If the NVRAM data is copied incorrectly (ie. in the wrong direction), the following problems will occur:
There is no way to verify the contents of the NVRAM chip on the Clock Board or the I/O Board. The banner command will show whatever POST has determined to be good data. POST will output a message (see below). As mentioned before, the NVRAM chip has a built-in battery to retain its data. The only way to fix a dead battery is to replace the NVRAM chip (ie. replace the Clock or I/O Board). If the battery is dead, the following messages will appear during POST: 5,0>ERROR: TEST=NVRAM Devices,SUBTEST=M48T59 (TOD) Init ID=8.1 NOTE: Patch 103346 contains the latest firmware (but hasn't been updated since March, 2006). Product Sun Enterprise 6000 Server Sun Enterprise 5000 Server Sun Enterprise 4000 Server Sun Enterprise 3000 Server Enterprise 3000-6000 PCI I/O Board Sun Enterprise 6500 Server Sun Enterprise 5500 Server Sun Enterprise 4500 Server Sun Enterprise 3500 Server Internal Comments In the US, view http://americasqual.central/qms/us/isodoc/sco/SCRP1016.html for the QMS NVRAM/SEEPROM Replacement Procedure. NVRAM, TOD, NVRAM/TOD, hostid, ethernet, OBP, copy-clock-tod-to-io-boards, copy-io-board-tod-to-clock-tod Previously Published As 73047 Attachments This solution has no attachment |
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