Multiple instances of scsi.cmd.pastTimeToLive messages observed on the system

Applies to

• FAS8700 / FAS8300 / AFF A400
• SAS adatper: Broadcom SAS3616W

ONTAP versions:

• 9.7P17 and lower
• 9.8P10 and lower
• 9.9.1P7 and lower
• 9.10.1P1 and lower

Issue

• The storage reports a problem with a SAS adapter:

Tue Jun 01 13:20:59 +0000 [node-01: asd_asyncd_1a: sas.port.down:debug]: SAS port "1b" went down.

• The adapter remains online, and the port itself also recovers.

	slot 1: SAS Host Adapter 1b (Broadcom SAS3616W rev. 2, SAS, <UP>)
		Firmware rev:      17.00.00.00
		NVDATA rev:        17.01.00.11
		Base WWN:          5:00605b:01098a9:84
		MFG Part Number:   111-04226
		Board Name:        HBA 9405W-16e
		Assembly:          03-50044-10006
		Serial number:     XXXXXXXXXX
		Phy State:         [0] Enabled, 6.0 Gb/s
		                   [1] Enabled, 6.0 Gb/s
		                   [2] Enabled, 6.0 Gb/s
		                   [3] Enabled, 6.0 Gb/s
		Mini-SAS HD Vendor:        Molex Inc.
		Mini-SAS HD Part Number:   112-00430+A0
		Mini-SAS HD Type:          Passive Copper (unequalized) 2m end_0

• After adding shelves to the existing stack connected to the adapter, all of them start reporting messages such as:

Wed Jun 02 12:32:05 +0000 [node-01: scsi_cmdblk_strthr_admin: scsi.cmd.pastTimeToLive:error]: Unknown device 1b.19.99: request failed after try #1: cdb 0x12.

Wed Jun 02 12:32:05 +0000 [node-01: scsi_cmdblk_strthr_admin: scsi.cmd.pastTimeToLive:error]: Unknown device 1b.18.99: request failed after try #1: cdb 0x12.

Wed Jun 02 12:32:05 +0000 [node-01: scsi_cmdblk_strthr_admin: scsi.cmd.pastTimeToLive:error]: Unknown device 1b.17.99: request failed after try #1: cdb 0x12.

Wed Jun 02 12:32:05 +0000 [node-01: scsi_cmdblk_strthr_admin: scsi.cmd.pastTimeToLive:error]: Unknown device 1b.16.99: request failed after try #1: cdb 0x12.