Hi folks,
I'm using my OpenMediaVault server just as a repository for backups of my other Linux stuff using RSYNC. As a result, I used an Intel NUC Celeron 3050 as the vault server with an external USB 3.0 8TB drive enclosure.
If I ever attempt to get S.M.A.R.T data from this disk, I get USB interface errors and USB resets. But in general, USB seems flaky and along with the bus resets I occasionally see "cmd cmplt err -2" from the UAS driver. I seem to have reduced the frequency of those by disabling USB legacy in the BIOS.
I googled the heck out of this and can't see any specific reasons why I can't use USB for storage.
Code
May 20 14:31:06 vault kernel: [182708.909910] sd 2:0:0:0: [sdb] tag#29 uas_eh_abort_handler 0 uas-tag 1 inflight: CMD IN
May 20 14:31:06 vault kernel: [182708.909937] sd 2:0:0:0: [sdb] tag#29 CDB: ATA command pass through(16) 85 09 0e 00 00 00 01 00 00 00 00 00 00 00 2f 00
May 20 14:31:06 vault kernel: [182708.926042] scsi host2: uas_eh_device_reset_handler start
May 20 14:31:06 vault kernel: [182709.055323] usb 2-3: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd
May 20 14:31:06 vault kernel: [182709.083087] scsi host2: uas_eh_device_reset_handler success
May 20 14:31:27 vault kernel: [182729.389633] sd 2:0:0:0: [sdb] tag#29 uas_eh_abort_handler 0 uas-tag 1 inflight: CMD
May 20 14:31:27 vault kernel: [182729.389658] sd 2:0:0:0: [sdb] tag#29 CDB: ATA command pass through(16) 85 0a 06 00 d6 00 01 00 e0 00 4f 00 c2 00 b0 00
May 20 14:31:27 vault kernel: [182729.405603] scsi host2: uas_eh_device_reset_handler start
May 20 14:31:27 vault kernel: [182729.409582] xhci_hcd 0000:00:14.0: ERROR Unknown event condition 199 for slot 4 ep 3 , HC probably busted
May 20 14:31:27 vault kernel: [182729.534808] usb 2-3: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd
May 20 14:31:27 vault kernel: [182729.564642] scsi host2: uas_eh_device_reset_handler success
May 20 14:31:47 vault kernel: [182749.869301] sd 2:0:0:0: [sdb] tag#29 uas_eh_abort_handler 0 uas-tag 1 inflight: CMD IN
May 20 14:31:47 vault kernel: [182749.869327] sd 2:0:0:0: [sdb] tag#29 CDB: ATA command pass through(16) 85 09 0e 00 00 00 01 00 11 00 00 00 00 00 2f 00
May 20 14:31:47 vault kernel: [182749.885191] scsi host2: uas_eh_device_reset_handler start
May 20 14:31:47 vault kernel: [182750.018574] usb 2-3: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd
May 20 14:31:47 vault kernel: [182750.045403] scsi host2: uas_eh_device_reset_handler success
May 20 14:33:05 vault kernel: [182827.691908] sd 2:0:0:0: [sdb] tag#29 uas_eh_abort_handler 0 uas-tag 1 inflight: CMD
May 20 14:33:05 vault kernel: [182827.691934] sd 2:0:0:0: [sdb] tag#29 CDB: Write(10) 2a 00 3a 38 81 4b 00 00 08 00
May 20 14:33:05 vault kernel: [182827.704230] scsi host2: uas_eh_device_reset_handler start
May 20 14:33:10 vault kernel: [182832.800167] usb 2-3: Disable of device-initiated U1 failed.
May 20 14:33:15 vault kernel: [182837.920616] usb 2-3: Disable of device-initiated U2 failed.
May 20 14:33:15 vault kernel: [182838.048839] usb 2-3: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd
May 20 14:33:15 vault kernel: [182838.077573] scsi host2: uas_eh_device_reset_handler success
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