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Solution Type Sun Alert Sure Solution 1019604.1 : On Certain Sun Enterprise, Blade, and Netra Servers, TOD may Advance as Much As One Second Every Fifteen Minutes
PreviouslyPublishedAs 242106 Bug Id <SUNBUG: 6676309>, <SUNBUG: 6667409>, <SUNBUG: 6682970>, <SUNBUG: 6674205> Product Sun SPARC Enterprise T5120 Server Sun SPARC Enterprise T5220 Server Sun SPARC Enterprise T5140 Server Sun SPARC Enterprise T5240 Server Sun Blade T6320 Server Module Sun Netra CP3260 ATCA Blade Server Sun Netra T5220 Server Date of Resolved Release 17-Sep-2008 On Certain Sun Enterprise, Blade, and Netra Servers, TOD may Advance as Much As One Second Every Fifteen Minutes 1. Impact On Sun SPARC Enterprise servers T5120, T5220, T5140 T5240, Sun Blade server T6320, and Sun Netra T5220 and CP3260 Servers, the "Time-of-Day" (TOD) on the system may advance as much as one second every fifteen minutes. Solaris and user applications (ie database applications) which use Solaris TOD may be adversely affected in that event timestamps may be incorrect, potentially affecting data integrity. 2. Contributing Factors This issue can occur on the following platforms: SPARC Platform
To determine the Firmware revision on the system, log into the Service Processor or CMM as 'root' and run the following: -> show /HOST
If a Service Processor /CMM admin account has been created, then log in to that account and run the following: sc> showplatform
and sc> showhost
3. Symptoms Solaris' TOD will advance faster than standard clock as much as one second every fifteen minutes. This means it can advance 90 seconds in a 24 hour period. This could cause database entries to have incorrect timestamps, which may affect data integrity. Due to "spread spectrum" enabled in the hardware clock, the sys-tick frequency VBSC passed on to Solaris does not match the clock frequency, causing an inaccurate calculation of Solaris time resulting in clock drifts of more than the acceptable parameter of less than 2 seconds a day. 4. Workaround (For Sun SPARC Enterprise T5120 and T5220 Servers only) To work around the described issue, edit "/etc/system" to include/change the following parameters: If it is a 1.2GHz system, set: sys_tick_freq=1165379275
If it is a 1.4GHz System, set: sys_tick_freq=1415103392
then run "init 0" and reboot Solaris. To determine if the system is 1.2GHz or 1.4GHz you can review SP console logs for the POST report which will list the speed. Also, prtdiag -v in Solaris will indicate the speed, as in the following: Sys 166 MHz, CPU 1415 MHz, Mem 332 MHz
The Solaris TOD drift will no longer occur after "/etc/system" is edited and 'init 0' is run and the Solaris reboot takes place. 5. Resolution This issue is addressed on the following platforms: SPARC Platform
This Sun Alert notification is being provided to you on an "AS IS" basis. This Sun Alert notification may contain information provided by third parties. The issues described in this Sun Alert notification may or may not impact your system(s). Sun makes no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. This Sun Alert notification contains Sun proprietary and confidential information. It is being provided to you pursuant to the provisions of your agreement to purchase services from Sun, or, if you do not have such an agreement, the Sun.com Terms of Use. This Sun Alert notification may only be used for the purposes contemplated by these agreements. Copyright 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved. Modification History 15-Oct-2008: Clarification to FW version listed in Contributing Factors and Resolution sections References<SUNPATCH: 136932-02><SUNPATCH: 136936-03> <SUNPATCH: 136933-04> <SUNPATCH: 136934-02> <SUNPATCH: 136935-01> Internal Comments Please send technical questions to the following email: [email protected] and CC the following persons: Internal Contributor/Submitter Internal Eng Responsible Engineer Internal Services Knowledge Engineer Internal Contributor/submitter [email protected], [email protected], [email protected] Internal Eng Responsible Engineer [email protected] Internal Services Knowledge Engineer [email protected] Internal Eng Business Unit Group SSG NSN (Netra Systems and Networking), NSG (Network Systems Group), SSG ES (Enterprise Systems) Internal Escalation ID 1-23403629 Internal Resolution Patches 136932-02, 136936-03, 136933-04, 136934-02, 136935-01 Internal Sun Alert & FAB Admin Info 15-Sep-2008, david m: draft created, send for review 17-Sep-2008, david m: review completed, send to publish Internal Sun Alert & FAB Admin Info 15-Sep-2008, david m: draft created, send for review 17-Sep-2008, david m: review completed, send to publish 15-Oct-2008, david m: minor modification to FW revision listed in CF and RES. per customer request ReferencesSUNPATCH:136932-02SUNPATCH:136933-04 SUNPATCH:136934-02 SUNPATCH:136935-01 SUNPATCH:136936-03 Attachments This solution has no attachment |
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