Dell EMC Unity: Unexpected SP reboot due to bugcheck caused by a watchdog timer expiration. (User Correctable)

           

   Article Number:     531345                                   Article Version: 3     Article Type:    Break Fix 
   

 


Product:

 

Dell EMC Unity Family

 

Issue:

 

 

Unexpected SP reboot due to Bug Panic caused by a watchdog timer expiration   
   
    From  spx/EMC/C4Core/log/c4_safe_native.log Search for:   
   
    CSX RT: panic requested at: KLogBugCheck.c:89 (thread: XXXXXXXXXXXXXXX aka XXXXXXXXXXXXXXX) [PID:XXXXX TID:XXXXX CORE:4 [csx_ic_std.x] [csx_tim_thr[4]!] [MM/DD/YEAR HH:MM:SS UTC]] (panic action:DEFAULT expr:<no-expr> flags:-) [info:0]   
   
     
                                                           

 

 

Cause:

 

 

The bugcheck was caused by a watchdog timer expiration.  A timing window   
    when an I/O request is received while a relocation is completing allows   
    for cases where the timer is not properly canceled.
                                                           

 

 

Change:

 

 

This Bug Panic can be triggered in either SP. The Issue is caused by a race condition between relocate slice and slice attributes integrity check.                                                           

 

 

Resolution:

 

 

To confirm the cause Escalate it to EE along with safe dump and support materials during SP Panic.   
   
    This bug is fixed in OE Code 4.5 Please upgrade Code