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SAS cable with Rate Unknown on both sides

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Applies to

  • FAS/AFF
  • SAS cable

Issue

  • Rate unknown for each PHY in sysconfig -a :

slot 0: SAS Host Adapter 0d (Broadcom SAS3616W rev. 2, SAS, <OFFLINE (hard)>)
Firmware rev:      12.00.00.00
NVDATA rev:        12.03.01.03
Base WWN:          5:00a098:00eb3e1:76
Temperature:       Not Available
Phy State:         [0] Enabled, Rate unknown
                   [1] Enabled, Rate unknown
                   [2] Enabled, Rate unknown
                   [3] Enabled, Rate unknown

 

  • Shelf PHY for the cable also show as unknown:

Partial Path   Link    Invalid   Running     Loss    Phy       CRC     Phy
Disk          Port   Timeout        Rate     DWord    Disparity   Dword   Reset     Error   Change
Id           State   Value (ms)    (Gb/s)    Count    Count       Count   Problem   Count   Count
--------------------------------------------------------------------------------------------------
[HST0/P0:0 ] OK             7       12.0        0           0       0        0         0       5
[HST1/P0:1 ] OK             7       12.0        0           0       0        0         0       5
[HST2/P0:2 ] OK             7       12.0        0           0       0        1         0       5
[HST3/P0:3 ] OK             7       12.0        0           0       0        1         0       5
[HST4/P1:0 ] EMPTY          7         NA        0           0       0        0         0       0
[HST5/P1:1 ] EMPTY          7         NA        0           0       0        0         0       0
[HST6/P1:2 ] EMPTY          7         NA        0           0       0        0         0       0
[HST7/P1:3 ] EMPTY          7         NA        0           0       0        0         0       0
[HST8/P2:0 ] UNKWN LNK      7         NA        0           0       0        0         0      12
[HST9/P2:1 ] UNKWN LNK      7         NA        0           0       0        0         0       8
[HST10/P2:2] UNKWN LNK      7         NA        0           0       0        1         0       8
[HST11/P2:3] UNKWN LNK      7         NA        0           0       0        1         0       8

 

  • EMS shows the port as timing out then offlining the port:

[Node1: scsi_cmdblk_strthr_admin: scsi.cmd.pastTimeToLive:error]: Enclosure services device 0d.00.99: request failed after try #1: cdb 0x1c.
[Node1: asd_timeoutd_0: sas.link.error:error]: Could not recover link on SAS adapter 0d after 110 seconds. Offlining the adapter.

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