HP-UX 11i v3 Read Before Installing or Updating, February 2007 (Initial Release)

USB Optical Drive Error Message During Boot
On systems with attached USB optical drives that have no
media inserted in the drive, messages similar to the
following may appear in the dmesg buffer during boot-up:
ERROR in SCSI Command ReadCapacity:
Error Code: 0x70
File Mark, EOM, ILI: 0x00
Sense Key: 0x2
Additional Sense: 0x3a
Additional Sense Qualifier: 0x00
What To Do
You can safely ignore these messages.