HP Surestore 80fx Optical Drive and Library SCSI-2 Command Reference - Page 133

SCSI-2 Drive Command Set Read Defect Data (Group 1) Command (37H) Table 2-83 Read Defect Data (Group 1) Command (37H) This command reads optical disk defect information. The data returned starts with a 4-byte header, followed by one or more defect descriptors. Read Defect Data (Group 1) Command CDB Byte 0 1 2 3 4 5 6 7 8 9 7 6 5 4 3 2 1 0 Operation Code (37H) Reserved (0) Reserved (0) PList GList Defect List Format Reserved (0) Reserved (0) Reserved (0) Reserved (0) Allocation Length (MSByte) Allocation Length (LSByte) Reserved (0) Flag Link PList and GList A PList bit of 0 and a GList bit of 1 indicates the drive will return the contents of the defect list (SDL). A PList bit of 1 and a GList bit of 0 indicates the drive will return the contents of the PDL. A PList bit of 1 and a GList bit of 1 indicates the drive will return the contents of the PDL and the SDL. 2-96 Chapter 2