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FAS2820 Unable to Start System-Level Diagnostics

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Category:
ontap-9
Specialty:
hw
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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!

  • Diag mode starts successfully only after disconnecting the SAS cables.

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