SAS port has disabled PHY
Applies to
- ONTAP 9
- serial-attached SCSI (SAS)
Issue
- SAS port show Amber LED
- SAS port PHY disabled alert in
system health alert show.
Clutser1::> system health alert show
Node: Node1
Resource: Port 0b
Severity: Major
Indication Time: Fri Jan 03 01:07:42 2020
Suppress: false
Acknowledge: false
Probable Cause: SAS port 0b on controller Node1 has 1 disabled
PHYs.
Possible Effect: Inactive PHYs might cause degraded link performance.
Corrective Actions: 1. Verify that SAS port 0b has disabled PHYs by using the "storage port show -node Node1 -port 0b" command.
2. If the disk shelves connected to port 0b have multiple path to the node, reset port 0b by using the (privilege: advanced) "storage port reset -node Node1 -port 0b" command.
3. Verify that the physical cable connection is secure and operational. If the disk shelves are multipathed, reseat the cable.
4. If the connected disk shelf is multipathed, replace
the SAS cable.
- Disabled PHY in
sysconfig -a.
slot 0: SAS Host Adapter 0b (PMC-Sierra PM8070 rev. C, SAS, <UP>)
Firmware rev: 03.08.09.00
Base WWN: 5:00a098:003abb6:34
Phy State: [4] Disabled
[5] Enabled, 12.0 Gb/s
[6] Enabled, 12.0 Gb/s
[7] Enabled, 12.0 Gb/s
- EMS log report error:
ERROR sasmon.adapter.phy.disable: Phy 14 of HBA 0a will be disabled due to excessive number of running disparity errors.
or
ERROR sasmon.adapter.phy.disable: Phy 2 of HBA 0a will be disabled due to burst of invalid dword errors.
Note: that the issue might be seen on the other side of the connection (ie on the IOM)
Cluster::*> storag shelf show -shelf 6.76
(...)
SAS Ports:
-- Port Speeds Gb/s -- Power Port
Phy # IOM Port Type WWPN Operational Negotiated Status Status
----- --- --------- ----------------- ----------- ---------- ------ -----------
(...)
8 B Host 500a098007d72e84 12.0 - - Enabled
9 B Host 500a098007d72e84 12.0 - - Enabled
10 B Host 500a098007d72e84 12.0 - - Enabled
11 B Host 500a098007d72e84 - - - phy_dis_inval_dword
Cluster::*> event log show -node node2|node1 -event *ds.sas*
Time Node Severity Event
------------------- ------ ------------- ---------------------------
5/2/2022 12:18:22 node2 ALERT ds.sas.hostphy.disableErr: Port [HST2] on channels 9d shelf ID 76 IOM B disabled due to excessive invalid dword error.
5/2/2022 12:17:46 node2 DEBUG ds.sas.running.disparity: [HST2] on channels 9d shelf ID 76 IOM B bay - reports running disparity errors.
5/2/2022 12:15:40 node2 DEBUG ds.sas.running.disparity: [HST2] on channels 9d shelf ID 76 IOM B bay - reports running disparity errors.
5/2/2022 12:15:04 node2 DEBUG ds.sas.running.disparity: [HST2] on channels 9d shelf ID 76 IOM B bay - reports a running