Dell PowerSwitch S4820T 9.50.1 Configuration Guide for the S4820T System - Page 1061
Trace Logs, Auto Save on Crash or Rollover, Last Restart Reason (S4820T), Hardware Watchdog Timer
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Test 5 - Fan Tray Air Flow Status Test PASS Test 6.000 - TMP75A-CPU PASS Test 6.001 - TMP75B-MAC PASS Test 6.002 - TMP75C-LEFT-PHY PASS Test 6.003 - TMP75D-RIGHT-PHY PASS Test 6 - Temp Sensor Access Test PASS Test 7 - RTC Presence Test PASS Test 8 - SDRAM Presence Test PASS Trace Logs In addition to the syslog buffer, Dell Networking OS buffers trace messages which are continuously written by various Dell Networking OS software tasks to report hardware and software events and status information. Each trace message provides the date, time, and name of the Dell Networking OS process. All messages are stored in a ring buffer. You can save the messages to a file either manually or automatically after failover. Auto Save on Crash or Rollover Exception information for MASTER or standby units is stored in the flash:/TRACE_LOG_DIR directory. This directory contains files that save trace information when there has been a task crash or timeout. • On a MASTER unit, you can reach the TRACE_LOG_DIR files by FTP or by using the show file command from the flash://TRACE_LOG_DIR directory. • On a Standby unit, you can reach the TRACE_LOG_DIR files only by using the show file command from the flash://TRACE_LOG_DIR directory. NOTE: Non-management member units do not support this functionality. Last Restart Reason (S4820T) If an S4820T system restarts for some reason (automatically or manually), the show system command output includes the reason for the restart. The following table shows the reasons displayed in the output and their corresponding causes. Table 78. Line Card Restart Causes and Reasons Causes Displayed Reasons Remote power cycle of the chassis push button reset reload soft reset reboot after a crash soft reset Hardware Watchdog Timer The hardware watchdog command automatically reboots an Dell Networking OS switch/router with a single RPM that is unresponsive. This is a last resort mechanism intended to prevent a manual power cycle. S-Series Debugging and Diagnostics 1061
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