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Cable attached to SAS port x is functioning in a degraded mode

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Category:
fas-systems
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hw
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Applies to

  • ONTAP 9
  • SAS storage shelves
  • System is cabled Multipath-HA

Issue

  • EMS reports:

[sas.cable.degraded:warning]: Cable attached to SAS port "0b" is functioning in a degraded mode

  • The speed of some PHYs is reduced when checked from sysconfig -a output:

::> system node run -node <node-name> -command sysconfig -a

 slot 0: SAS Host Adapter 0b (PMC-Sierra PM8072 rev. C, SAS, <UP>)
                Firmware rev:       03.08.09.00
                Base WWN:           5:00a098:00e1428:a4
                Temperature:        Not Available
                Phy State:          [8] Enabled, 12.0 Gb/s
                                    [9] Enabled, 6.0 Gb/s
                                    [10] Enabled, 6.0 Gb/s
                                    [11] Enabled, 12.0 Gb/s        

 

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