Hundreds, maybe thousands of lines like this (wrapped for mail):
Feb 16 09:38:47 reader kernel: [162289.090685] usb 4-2.1:1.1: uevent
Feb 16 09:38:48 reader kernel: [162289.467065] hdc: status error:
status=0x00 { }
Feb 16 09:38:48 reader kernel: [162289.467071] hdc: possibly failed
opcode: 0xa0
Feb 16 09:38:48 reader kernel: [162289.467079] ide-atapi: hdc:
Strange, packet command initiated yet DRQ isn't asserted
When I noticed this output involving the cdrom I wondered if I might
have left something in it but that was not the case.