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| Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition | ||
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Solution Type Problem Resolution Sure Solution 1002179.1 : The diag-out-console OBP setting
PreviouslyPublishedAs 203088 Symptoms A customer's Sun Fire[TM] 480 had a number of fatal resets. Even with console logging enabled via the ttya port, no diagnostic information appeared on the console either before or after the reset. The only clue to the fact that a fatal reset was indeed happening was: System booting after fatal error FATAL Sys Hardware Additionally, POST data was not appearing on the console, unless the keyswitch was placed in the diagnostic position. Resolution After examining the eeprom settings it was discovered that the customer had changed diag-out-console=false (this is the default setting) to diag-out-console=true The problem is that if this parameter is 'true' then fatal reset diagnostic data will be sent to the rsc, not the ttya port. The same is true for POST data unless you force it via the keyswitch. The customer changed this parameter back to false, and the next fatal reset had the necessary diagnostic data. It is easy to misunderstand this parameter since one may logically assume 'false' means 'no output to console' and true means 'send output to console'. In fact false means 'send to ttya' and true means 'send to rsc'. In summary: if a customer is NOT using the rsc card and needs to use the older method of console logging via the serial port, then the proper obp settings for machines with rsc capability are: Redirecting Console Server to TTYA(serial) OK setenv diag-out-console false OK setenv input-device keyboard (or TTYA) OK setenv output-device screen (or TTYA) OK reset-all If on the other hand they do decide to use RSC, the proper OBP settings are: Redirecting Console to RSC OK setenv diag-out-console true OK setenv input-device rsc-console OK setenv output-device rsc-console OK reset-all Product Sun Fire V480 Server Internal Comments Audited/updated 12/03/09 Silvana.Villamil@SUN.com, Entry Level SPARC Content Team Member For internal Sun use only. Charles Forgues assisted in determining the root cause for this issue. diag-out-console, rsc, console logging, fatal reset, 480 Previously Published As 81471 Change History Date: 2007-07-10 User Name: 71396 Action: Approved Comment: Performed final review of article. No changes required. Publishing. Version: 8 Date: 2007-07-09 User Name: 71396 Action: Accept Comment: Version: 0 Attachments This solution has no attachment |
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