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SAS Adapter port shows as rate unknown for one PHY (Internal shelf)

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Applies to

  • ONTAP 9
  • FAS2520
  • Internal Shelf, SAS Port

Issue

  • The following alert is reported in the event logs:

[Node-02: mgwd: callhome.hm.alert.major:alert]: Call home for Health Monitor process nchm: DegradedOnlinePort_Alert[0a].

  • Sytem Manager reports SAS Port as degraded (red)

 

  • PHY is disabled on the SAS port:

    slot 0: SAS Host Adapter 0a (PMC-Sierra PM8001 rev. C, SAS, <UP>)
        Firmware rev:       01.12.09.00
        Base WWN:           5:00a098:0070209:30
        Phy State:          [0] Enabled, 6.0 Gb/s
                            [1] Disabled
                            [2] Enabled, 6.0 Gb/s
                            [3] Enabled, 6.0 Gb/s

  • The same can be checked from the below output as well:

:> system node run -node <node> storage show shelf

Expander phy state on 0a.0 (NETAPP  :DS212IOM6E       SHXYZXXXX000000):
                              Pwr         Invald Disprt Loss   Phy    CRC    Phy
                          Pwr Ccl Rsv Rls DWord  Error  Sync   Reset  Error  Change SATA
PHY/BAY STATE             ON  Cnt Cnt Cnt Count  Count  Count  Prob   Cnt    Cnt    Affiliation
------- ----------------- --- --- --- --- ------ ------ ------ ------ ------ ------ ----------------
 0/P0:0 6.0 Gb/s          --- --- --- --- 0      0      0      0      0      11     ----------------
 1/P0:1 Rate unknown
 2/P0:2 6.0 Gb/s          --- --- --- --- 0      0      0      0      0      11     ----------------

  • Reseating the motherboard of the affected node may temporarily fix the issue but the errors return.

 

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