Fault LED is lit for no apparent reason on a FAS or AFF HA storage system with internal-only SAS storage
Applies to
- Platforms:
- AFF A220, AFF A200, AFF A150, AFF C190, ASA A150
- FAS2820, FAS2750, FAS2720, FAS2650, FAS2620, FAS2554, FAS2552, FAS2520
- High-availability configuration (2 processor control modules (PCM) are inserted in the chassis and are configured for HA operation)
- Internal SAS storage only (no external SAS storage shelves are attached)
- 0a or 0b SAS ports on the PCMs are directly connected to the SAS ports on the other PCM
Issue
Active IQ will report the following error:
Incorrect SAS cross-connect cabling between SAS ports 0a and 0b on PCM A and PCM B has been detected.
- EMS event: When port 0b on PCM A is connected directly to port 0b on PCM B, you will occasionally see this EMS event in the event log: config.invalid.PortToPort
Example:
Fri Dec 09 14:30:00 PST [node1: pmcsas_intrd_0: config.invalid.PortToPort:error]: SAS adapter "0b" is attached to another SAS adapter.
- Environment: Run the environment shelf nodeshell command from one of the nodes. The listed SAS cable serial number on the internal shelf's [2] and [4] SAS expander ports are identical. Expander port [2] is the 0a port on PCM A and port [4] is the 0a port on PCM B.
SAS cable information by element:
[1] Internal connector
[2] Vendor: Amphenol
Type: QSFP passive copper 0.5-1.0m ID: 01 Swaps: 0
Serial number: APF14131767EE1 Part number: 112-00176+A0
[3] Internal connector
[4] Vendor: Amphenol
Type: QSFP passive copper 0.5-1.0m ID: 00 Swaps: 0
Serial number: APF14131767EE1 Part number: 112-00176+A0
- sysconfig -a: Run the sysconfig -a nodeshell command from both nodes. The following conditions are observed:
System Storage Configuration: Single-Path HA
- The SAS 0b ports on both nodes show the identical QSFP serial number.
PCM A:
slot 0: SAS Host Adapter 0b (PMC-Sierra PM8001 rev. C, SAS, <UP>)
Firmware rev: 01.11.06.00
Base WWN: 5:00a098:00361ff:74
Phy State: [4] Enabled, 6.0 Gb/s
[5] Enabled, 6.0 Gb/s
[6] Enabled, 6.0 Gb/s
[7] Enabled, 6.0 Gb/s
QSFP Vendor: Amphenol
QSFP Part Number: 112-00176+A0
QSFP Type: Passive Copper 0.5m ID:01
QSFP Serial Number: APF14131767EDC
PCM B:
slot 0: SAS Host Adapter 0b (PMC-Sierra PM8001 rev. C, SAS, <UP>)
Firmware rev: 01.11.06.00
Base WWN: 5:00a098:0035e3d:b4
Phy State: [4] Enabled, 6.0 Gb/s
[5] Enabled, 6.0 Gb/s
[6] Enabled, 6.0 Gb/s
[7] Enabled, 6.0 Gb/s
QSFP Vendor: Amphenol
QSFP Part Number: 112-00176+A0
QSFP Type: Passive Copper 0.5m ID:00
QSFP Serial Number: APF14131767EDC
- SAS-Expander-Map: Run the sasstat expander_map nodeshell command from one of the nodes. The output contains only one entry on channel 0a.
Expanders on channel 0a:
Level 1: WWN 500a098003xxxxxx, ID 0, Serial Number ' SHFFG1416xxxxxx', Product 'DS212IOM6E ', Rev '0142', Slot A
Expanders on channel 0b: