ATTO bridge unexpected reboot - SAS Request Event - 0x34 errors

Applies to

• MetroCluster FC
• ATTO FiberBridge 7600
• ATTO firmware 4.20

Issue

• One or more ATTO FiberBridge 7600 devices experience unexpected reboot
• SAS Request Event - 0x34 errors are present in the event logs
• Reboot signature matches: 

1209EF 22:52:13 04/20/21 CRIT Software Interrupt Exception Detected (SWI) (001U)
1209F0 22:52:13 04/20/21 CRIT Instr Address    = 00253108
1209F1 22:52:13 04/20/21 CRIT SWI Number       = 0x000000
1209F2 22:52:13 04/20/21 INFO Software Interrupt
1209F3 22:52:13 04/20/21 INFO 04/20/2021 22:52:13
1209F4 22:52:13 04/20/21 INFO ST[3e968000-3e96c000] | FP[3e96beb4] CPSR[60000193]
1209F5 22:52:13 04/20/21 INFO 00143b5c<-0025d070 | SP[3e96beb8] FP[3e96bf24]
1209F6 22:52:13 04/20/21 INFO 0025cf44<-00000580 | SP[3e96bf28] FP[3e96bf6c]
1209F7 22:52:13 04/20/21 INFO 001d10dc<-00020a8c | SP[3e96bf70] FP[3e96bfcc]
1209F8 22:52:13 04/20/21 INFO 00020650<-000219cc | SP[3e96bfd0] FP[3e96bffc]
1209F9 22:52:13 04/20/21 INFO 00021908<-003e2360 | SP[3e96c000] FP[3e96c000]
1209FA 22:52:13 04/20/21 INFO Exception occurred. Possible redundant preceding log entries
1209FB 00:00:06 01/01/00 INFO Reset.  HW Code: Software Warm
1209FC 00:00:06 01/01/00 INFO Reset.  Reason: Critical Software Error Detected