HP Surestore 80fx Optical Drive and Library SCSI-2 Command Reference - Page 109

NOTE SCSI-2 Drive Command Set Mode Sense (Group 0) Command (1AH) FWC A Force Write Calibration bit of 1 instructs the drive to perform the Write Calibration routine at spin-up. A Force Write Calibration bit of 0 instructs the drive to perform the Write Calibration routine on receipt of the first Write command or 5 minutes after spin-up. The bits DAIR and Force Verify on this mode page can also be controlled in HP products by changing external switch settings. In HP's standalone box products, this is accomplished by changing the thumb wheel settings on the rear of the box. In HP's library products, this is accomplished by changing the front panel settings. In all cases, changes to the mode page settings will override the external switch settings. 2-72 Chapter 2