Jun  4 09:23:32 drook-desktop kernel: [1294365.477612] sd 4:0:0:0: [sdb] Unhandled error code

Jun  4 09:23:32 drook-desktop kernel: [1294365.477619] sd 4:0:0:0: [sdb] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK

Jun  4 09:23:32 drook-desktop kernel: [1294365.477625] sd 4:0:0:0: [sdb] CDB: Read(10): 28 00 00 00 00 7f 00 00 08 00

Jun  4 09:24:02 drook-desktop kernel: [1294396.101035] usb 1-8: reset high speed USB device using ehci_hcd and address 4

Jun  4 09:24:12 drook-desktop kernel: [1294406.344302] usb 1-8: reset high speed USB device using ehci_hcd and address 4

Jun  4 09:24:49 drook-desktop kernel: [1294443.101047] usb 1-8: reset high speed USB device using ehci_hcd and address 4

Jun  4 09:24:59 drook-desktop kernel: [1294453.345155] usb 1-8: reset high speed USB device using ehci_hcd and address 4

Jun  4 09:25:36 drook-desktop kernel: [1294490.101034] usb 1-8: reset high speed USB device using ehci_hcd and address 4

Jun  4 09:25:46 drook-desktop kernel: [1294500.345031] usb 1-8: reset high speed USB device using ehci_hcd and address 4

Jun  4 09:26:23 drook-desktop kernel: [1294537.101040] usb 1-8: reset high speed USB device using ehci_hcd and address 4

Jun  4 09:26:33 drook-desktop kernel: [1294547.345000] usb 1-8: reset high speed USB device using ehci_hcd and address 4

Jun  4 09:27:10 drook-desktop kernel: [1294584.101033] usb 1-8: reset high speed USB device using ehci_hcd and address 4

Jun  4 09:27:20 drook-desktop kernel: [1294594.345036] usb 1-8: reset high speed USB device using ehci_hcd and address 4

Jun  4 09:27:34 drook-desktop pulseaudio[1347]: ratelimit.c: 25777 events suppressed

Jun  4 09:27:39 drook-desktop pulseaudio[1347]: ratelimit.c: 28543 events suppressed

Jun  4 09:27:39 drook-desktop pulseaudio[1347]: protocol-native.c: Failed to push data into queue

Jun  4 09:27:57 drook-desktop pulseaudio[1347]: last message repeated 10 times

That's been repeating over and over for days. I'm guessing the external hard drive I had plugged in didn't unmount properly when I shut it down.