HP Surestore 80ex Optical Drive and Library SCSI-2 Command Reference - Page 163
Mode Sense Group 2 Command 5AH, Mode Data, Length, Medium Type, Table 2-120
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SCSI-2 Drive Command Set Mode Sense (Group 2) Command (5AH) Table 2-120 Mode Sense Header Byte 7 6 5 4 3 2 1 0 0 Mode Data Length (MSByte) 1 Mode Data Length (LSByte) 2 Medium Type 3 WP Reserved (0) Cache (1) Reserved (0) 4 Reserved (0) 5 Reserved (0) 6 Block Descriptor Length (MSByte) 7 Block Descriptor Length (LSByte) Mode Data Length This field specifies the length in bytes of the MODE SENSE data to follow. Medium Type The Medium Type field is set to 00H (default, only one medium type is supported), 02H (write-once optical disks), or 03H (rewritable optical disks), depending on the drive condition (00H if no disk or not ready, and 02H or 03H if it is ready to access the disk). WP A write protect bit of 1 indicates that the optical disk in the drive is write protected. 2-126 Chapter 2