Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition | |||
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Solution Type Sun Alert Sure Solution 1000616.1 : On Sun Fire 3800/4800/4810/6800, V1280, and Netra 1280 Domains, Time of Day (TOD) May Drift or Jump
PreviouslyPublishedAs 200817 Product Sun Fire 3800 Server Sun Fire 4800 Server Sun Fire 4810 Server Sun Fire 6800 Server Sun Fire V1280 Server Netra 1280 Server Bug Id <SUNBUG: 4876369> Date of Workaround Release 10-SEP-2003 Date of Resolved Release 04-NOV-2003 Impact On very rare occasions, the Time of Day (TOD) on Sun Fire 3800/4800/4810/6800, V1280, and Netra 1280 domains may be susceptible to a clock drift or jump. As a result, any functionality that relies upon the System Controller (SC) timer may be inaccurate. Contributing Factors This issue can occur in the following releases: SPARC Platform
Note: Systems with firmware 5.11.x are not affected by this issue. Use the "showsc -v" command to display the firmware version of the SC. Symptoms This issue may occur after 528 days of SC continuous uptime, where the TOD within a domain in the system may become random and unstable. The intervals reported have varied, but the behavior is generally that the TOD jumps backwards approximately one hour up to as much as one month. The TOD as seen by the SC itself does not jump. There are no specific messages that would indicate this issue has occurred. It can only be discovered by the domain exhibiting unexpected behavior due to the domain TOD changing unexpectedly. Workaround There are three options available that can be applied to avoid this issue:
To work around the described issue in a running domain, immediate relief can be obtained by setting the variable "tod_broken" to 1 in the domain kernel. This will cause Solaris to ignore the clock data coming from the Serengeti clock driver and use a domain kernel timebase as a reference instead. The following script can be invoked as "root" on the running domain to change the value of "tod_broken" in that domain's kernel: #!/bin/sh # # Set tod_broken # echo "tod_broken ?W 1" | adb -w -k /dev/ksyms /dev/mem # exit 0 Additionally, adding the line "set tod_broken=1" to the domain's "/etc/system" configuration information file will sustain the value of the "tod_broken" variable across a reboot of the domain. At the next maintenance opportunity, the platform SCs should be rebooted. For systems with firmware 5.13 or later and failover configured, this can be accomplished by rebooting the spare SC first. After it has come up again and failover has become enabled and active, run the "setfailover force" command to make it the main SC, then reboot the other SC. When the other SC completes its reboot, running "setfailover force" again will restore it to the main SC state if desired. For systems with firmware 5.12 or systems without failover enabled, it will be necessary to bring down any running domains before rebooting the SCs (Sun does not recommend rebooting a main SC with running domains as that action may disrupt domain operation). Once the platform SCs have been rebooted, the domain TOD jumping will not recur for another 500 days. The "set tod_broken=1" variable can be removed from the "/etc/system" file, and reset to 0 in a running domain kernel by substituting 0 for 1 in the above script. Resolution This issue is addressed in the following releases:
Note: The patch must be added to both system controllers to remedy this issue. Modification History Date: 18-NOV-2004
Date: 20-OCT-2004
Date: 13-OCT-2004
Date: 04-NOV-2003
References<SUNPATCH: 112884-04><SUNPATCH: 113751-05> Previously Published As 101335 Internal Comments
SC: SSC0
Sat Jun 7 10:02:43 JST 2003
Internal Contributor/submitter [email protected] Internal Eng Business Unit Group SSG ES (Enterprise Systems) Internal Eng Responsible Engineer [email protected] Internal Services Knowledge Engineer [email protected] Internal Escalation ID 546489 Internal Resolution Patches 112884-04, 113751-05 Internal Sun Alert Kasp Legacy ID 101335, 56680 (Sun Alert) Internal Sun Alert & FAB Admin Info Critical Category: Availability ==> Pervasive Significant Change Date: 2003-09-10, 2003-11-04 Avoidance: Patch, Workaround Responsible Manager: [email protected] Original Admin Info: This document has been imported from KMS Creator and may need adjustment before re-publishing. This imported document has been reviewed/adjusted by: Review Name: Review Date: Original KMS Creator attributes below: --- PLEASE DO NOT MAKE ANY CHANGES BELOW THIS LINE! --- Sun Alert ID: 56680 Synopsis: On Sun Fire 3800/4800/4810/6800, V1280, and Netra 1280 Domains, Time of Day (TOD) May Drift or Jump Category: Availability Product: Sun Fire Servers 3800/4800/4810/6800, V1280, Netra 1280 BugIDs: 4876369 Avoidance: Patch, Workaround State: Resolved Date Released: 10-Sep-2003, 04-Nov-2003 Date Closed: 04-Nov-2003 Date Modified: 04-Nov-2003, 13-Oct-2004, 20-Oct-2004, 18-Nov-2004 Escalation IDs: 546489 Pending Patches: Resolution Patches: 112884-04, 113751-05 FIN: FCO: Date Submitted: 08-Sep-2003 Submitter: [email protected] Responsible Engineer: [email protected] Responsible Manager: [email protected] CTE group: CPRE ESP EMEA Responsible Writer: [email protected] Distribution: Public SunSolve Workflow History: WF State: Issued, 18-Nov-2004, David Mariotto WF Note: version addition to Contributing Factors WF State: Issued, 13-Oct-2004, David Mariotto WF Note: added V1280/Netra 1280 to CF and Res. w/patch WF State: Issued, 04-Nov-2003, David Mariotto WF Note: Complet all Updates (patch, resolved) and re-release WF State: Issued, 20-Oct-2003, David Mariotto WF Note: Recently issued patch only resolves issue for one firmware revision. WF State: Issued, 10-Sep-2003, David Mariotto WF Note: Signoff by PTS, (Saaid), sent for release WF State: Draft, 10-Sep-2003, David Mariotto WF Note: Review completed, sent for signoff WF State: Draft, 09-Sep-2003, David Mariotto WF Note: Sending for review WF State: Draft, 09-Sep-2003, David Mariotto WF Note: waiting on minor clarification from submitter WF State: Draft, 08-Sep-2003, David Mariotto WF Note: Article created. Exported from KMS Creator Sat May 21 09:03:37 2005 GMT, [email protected] Internal SA-FAB Eng Submission On Sun Fire 3800/4800/4810/6800, V1280, and Netra 1280 Domains, Time of Day (TOD) May Drift or Jump Product_uuid 29d05214-0a18-11d6-92b2-a111614865b5|Sun Fire 3800 Server 29d3a694-0a18-11d6-92da-df959df44cdd|Sun Fire 4800 Server 29d6f808-0a18-11d6-8aa8-943929fbbdd8|Sun Fire 4810 Server 29da7938-0a18-11d6-8a41-9ed1ad6d6779|Sun Fire 6800 Server 6a74b2f9-bbd8-4b2c-870d-b6b73d6e224f|Sun Fire V1280 Server e41a7084-3dbf-472d-918b-efb50dcbc220|Netra 1280 Server ReferencesSUNPATCH:112884-04SUNPATCH:113751-05 Attachments This solution has no attachment |
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