aarch64 (Windows Dev Kit 2023): "ure0: spurious link down (PHY link up), overriding" and umass WRITE(10)/READ(10) errors

Reply: bob prohaska : "Re: aarch64 (Windows Dev Kit 2023): "ure0: spurious link down (PHY link up), overriding" and umass WRITE(10)/READ(10) errors"
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From: Mark Millard <marklmi_at_yahoo.com>
Date: Thu, 23 Apr 2026 06:11:10 UTC
In recent times I've been seeing the following sort of sequence
repeating in the WINd Dev Kit 2023 environment that used to not do such.
Two different USB3 capable show the USB3 WRITE/READ behavior, one per
USB-A port. There is also the ure0 spurious link down behavior. (I have
tried to use blank lines to isolate timestamp changes.)

. . .
Apr 22 20:08:33 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:09:53 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:10:00 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 53 49 3d d8 00 00 08 00
Apr 22 20:10:00 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:10:00 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:10:00 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 a9 2c 07 40 00 01 40 00
Apr 22 20:10:00 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:10:00 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:11:50 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:12:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 62 da 3f c0 00 00 10 00
Apr 22 20:12:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:12:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:12:18 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 7f 93 a4 40 00 01 80 00
Apr 22 20:12:18 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:12:18 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:13:02 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:13:09 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 62 8e f5 00 00 00 28 00
Apr 22 20:13:09 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:13:09 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:13:09 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 7f 6e f9 00 00 01 40 00
Apr 22 20:13:09 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:13:09 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:13:25 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:13:33 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 6c fc ee 40 00 00 28 00
Apr 22 20:13:33 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:13:33 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:13:33 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 72 5f 0a 00 00 02 00 00
Apr 22 20:13:33 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:13:33 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:14:03 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:14:10 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 6d 31 4d 00 00 00 40 00
Apr 22 20:14:10 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:14:10 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:14:10 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 7d 48 f9 00 00 00 c0 00
Apr 22 20:14:10 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:14:10 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:14:19 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:14:31 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 22 1e 4a c0 00 00 18 00
Apr 22 20:14:31 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:14:31 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:14:31 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 81 7e 96 00 00 01 80 00
Apr 22 20:14:31 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:14:31 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:15:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 62 45 e1 78 00 00 08 00
Apr 22 20:15:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:15:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:15:18 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 7f 17 79 00 00 00 20 00
Apr 22 20:15:18 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:15:18 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:15:29 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:15:34 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 22 35 2f c0 00 00 38 00
Apr 22 20:15:34 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:15:34 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:17:29 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:17:38 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 63 ef a6 b8 00 00 08 00
Apr 22 20:17:38 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:17:38 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:17:44 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:17:53 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 5f d7 a1 80 00 00 40 00
Apr 22 20:17:53 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:17:53 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:17:59 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:18:07 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
READ(10). CDB: 28 00 5f f3 07 40 00 00 40 00
Apr 22 20:18:07 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:18:07 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:18:57 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 61 12 3d 80 00 08 00 00
Apr 22 20:18:57 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:18:57 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:19:52 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:19:59 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 60 4a c6 c0 00 03 00 00
Apr 22 20:19:59 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:19:59 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:19:59 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 72 98 cf 40 00 01 40 00
Apr 22 20:19:59 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:19:59 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:20:13 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:20:20 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 62 81 d8 c0 00 00 40 00
Apr 22 20:20:20 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:20:20 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:20:20 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 72 ea 05 80 00 02 00 00
Apr 22 20:20:20 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:20:20 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:20:28 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:21:08 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 5f 62 49 10 00 00 08 00
Apr 22 20:21:08 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:21:08 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:21:08 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 6d a5 bd 40 00 02 00 00
Apr 22 20:21:08 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:21:08 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:21:30 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 60 ab 69 c0 00 00 28 00
Apr 22 20:21:30 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:21:30 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:21:30 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 6e 84 37 c0 00 02 00 00
Apr 22 20:21:30 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:21:30 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:22:11 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:22:19 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 5f d3 7c 80 00 00 40 00
Apr 22 20:22:19 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:22:19 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:22:25 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:22:38 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 5f b0 0f c0 00 00 40 00
Apr 22 20:22:38 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:22:38 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:23:04 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:23:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 61 14 cd 80 00 00 18 00
Apr 22 20:23:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:23:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:23:33 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:23:41 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 60 c1 19 88 00 00 08 00
Apr 22 20:23:41 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:23:41 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:23:41 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 78 66 52 80 00 02 00 00
Apr 22 20:23:41 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:23:41 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:24:39 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:24:46 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 23 3e 7c 90 00 00 10 00
Apr 22 20:24:46 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:24:46 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:24:46 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 76 95 ab c0 00 01 80 00
Apr 22 20:24:46 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:24:46 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:24:53 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:25:03 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 23 45 7b d0 00 00 18 00
Apr 22 20:25:03 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:25:03 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:25:03 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 76 8f 6f 00 00 01 80 00
Apr 22 20:25:03 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:25:03 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:25:24 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:25:31 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 23 68 01 98 00 00 08 00
Apr 22 20:25:31 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:25:31 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:25:31 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 7b fc aa 00 00 01 40 00
Apr 22 20:25:31 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:25:31 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:26:02 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:26:09 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 25 c2 37 c0 00 00 10 00
Apr 22 20:26:09 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:26:09 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:26:40 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:26:47 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 7c 76 7a c0 00 01 00 00
Apr 22 20:26:47 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:26:47 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain
Apr 22 20:26:47 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 26 30 57 30 00 00 10 00
Apr 22 20:26:47 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:26:47 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:27:33 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:27:41 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 22 e9 7d 80 00 08 00 00
Apr 22 20:27:41 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:27:41 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:28:05 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:28:13 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 22 e8 79 60 00 00 08 00
Apr 22 20:28:13 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:28:13 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:28:13 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 7e 5b 57 00 00 02 00 00
Apr 22 20:28:13 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:28:13 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:28:22 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:28:33 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 7e 6c 7d 00 00 01 80 00
Apr 22 20:28:33 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:28:33 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain
Apr 22 20:28:33 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 26 61 d9 f8 00 00 08 00
Apr 22 20:28:33 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:28:33 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:28:47 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:28:55 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 24 a7 94 c0 00 00 28 00
Apr 22 20:28:55 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:28:55 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:28:55 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 76 a5 62 c0 00 02 00 00
Apr 22 20:28:55 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:28:55 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:29:03 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:30:10 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 27 36 38 00 00 00 08 00
Apr 22 20:30:10 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:30:10 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:30:52 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding
Apr 22 20:30:57 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 5f 65 a4 80 00 00 c0 00
Apr 22 20:30:57 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:30:57 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:31:06 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:31:15 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 5f 65 b1 c0 00 02 c0 00
Apr 22 20:31:15 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:31:15 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:31:15 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 69 d6 31 80 00 02 00 00
Apr 22 20:31:15 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:31:15 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:31:28 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 69 d6 2d 70 00 00 10 00
Apr 22 20:31:28 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:31:28 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:32:13 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:32:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 5f 12 d9 40 00 00 40 00
Apr 22 20:32:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:32:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:32:30 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:32:37 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 5f 2f e0 a0 00 00 20 00
Apr 22 20:32:37 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:32:37 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:32:37 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 69 6d e8 00 00 00 c0 00
Apr 22 20:32:37 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:32:37 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:32:57 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
READ(10). CDB: 28 00 61 70 54 80 00 00 40 00
Apr 22 20:32:57 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:32:57 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:33:19 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:33:24 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 5e ef 6e 28 00 00 18 00
Apr 22 20:33:24 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:33:24 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:33:47 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 61 60 7b 58 00 00 08 00
Apr 22 20:33:47 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:33:47 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:33:47 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 6b 1e 76 00 00 01 00 00
Apr 22 20:33:47 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:33:47 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:34:27 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:34:32 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 61 c1 85 80 00 00 40 00
Apr 22 20:34:32 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:34:32 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:34:45 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:34:55 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 61 d5 1e 68 00 00 10 00
Apr 22 20:34:55 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:34:55 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:35:29 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:35:37 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 61 f7 eb f0 00 00 10 00
Apr 22 20:35:37 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:35:37 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:35:37 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 6b a1 e3 80 00 02 00 00
Apr 22 20:35:37 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:35:37 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:35:44 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:35:57 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 6c 10 89 80 00 00 c0 00
Apr 22 20:35:57 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:35:57 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:36:06 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:36:28 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 61 f9 11 c0 00 00 40 00
Apr 22 20:36:28 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:36:28 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:36:28 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 6c 5b ef c0 00 01 40 00
Apr 22 20:36:28 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:36:28 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:40:13 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:40:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 67 0d 8e 90 00 00 10 00
Apr 22 20:40:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:40:18 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

Apr 22 20:40:30 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:40:53 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 65 92 a9 38 00 00 08 00
Apr 22 20:40:53 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:40:53 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:40:53 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 70 1b 27 c0 00 02 00 00
Apr 22 20:40:53 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:40:53 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain
Apr 22 20:40:53 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding
Apr 22 20:40:53 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 62 93 4e 80 00 06 80 00
Apr 22 20:40:53 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:40:53 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:40:53 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 70 14 92 00 00 01 80 00
Apr 22 20:40:53 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:40:53 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:41:00 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:41:07 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 65 5d b4 80 00 02 80 00
Apr 22 20:41:07 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:41:07 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain
Apr 22 20:41:07 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
READ(10). CDB: 28 00 70 64 ae 80 00 02 00 00
Apr 22 20:41:07 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0): CAM
status: CCB request completed with an error
Apr 22 20:41:07 aarch64-main-pbase kernel: (da0:umass-sim0:0:0:0):
Retrying command, 3 more tries remain

Apr 22 20:41:24 aarch64-main-pbase kernel: ure0: spurious link down (PHY
link up), overriding

Apr 22 20:42:28 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
WRITE(10). CDB: 2a 00 68 6f 56 00 00 07 80 00
Apr 22 20:42:28 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0): CAM
status: CCB request completed with an error
Apr 22 20:42:28 aarch64-main-pbase kernel: (da1:umass-sim1:1:0:0):
Retrying command, 3 more tries remain

. . .

Absent much USB3 WRITE activity being involved because rsync is not
finding differences to copy over, this seems to be far more rare. That
includes the "spurious link down" messages being rare and there likely
being no READ error messages. For example: 2 "spurious link down"
notices and 1 "WRITE(10)" message sequence.

The pattern can happen with just a USB3 boot drive and the other USB3
port not in use. Again significant USB3 write activity increases the
frequency greatly.

For the retries remaining notices, I've only seen "3", never more or less.


I see this with upstream pkgbase distributions of main booted (debug or
non-debug kernel and debug boot world) --and with my personal kernel
builds (same boot world).

The rsync status display activity for a transfer between the two USB3
drives hangs up for temporary periods around when there is this sort of
messaging going on.


-- 
===
Mark Millard
marklmi at yahoo.com