FAS2820 Unable to Start System-Level Diagnostics
Applies to
- NetApp FAS2820
- ONTAP 9
- Systems with external SAS shelves connected
Issue
- When attempting to start system-level diagnostics during initial setup or hardware maintenance, the diag mode fails to start if SAS shelf cables are connected. The following log output is observed:
LOADER-A> boot_diags
Wait for driver loading...[73.264215] sas: TMF task timeout for 5000c500f5897afe and not done[114.736221] sas: TMF task timeout for 5000c500f5897afe and not done[156.208223] sas: TMF task timeout for 5000c500f5897afe and not done[197.680218] sas: TMF task timeout for 5000c500f5897afe and not done[197.686648] pm80xx: rc=-5...********************************************************* Loading driver timeout! ENV setup may be incomplete!! *********************************************************ls: cannot access '/sys/class/sas_phy/phy-6:4/device/port/': No such file or directory[402.857729] Midplane not recognized after 5 retries!
- The system may panic and reboot ONTAP directly.
LOADER-A> boot_diags[ 36.140140] Kernel panic - not syncing: Fatal exception in interrupt[ 36.372966] Kernel Offset: disabled[ 36.573955] Rebooting in 60 seconds..
- Diag mode starts successfully only after disconnecting the SAS cables.