HP Surestore 160fx Optical Drive and Library SCSI-2 Command Reference - Page 179
Read Defect Data (Group 5) Command (B7H),
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SCSI-2 Drive Command Set Read Defect Data (Group 5) Command (B7H) Table 2-127 Read Defect Data (Group 5) Command (B7H) This command reads optical disk defect information. The data returned starts with an 8-byte header, followed by one or more defect descriptors. Read Defect Data (Group 5) Command CDB Byte 7 6 5 4 3 2 1 0 0 Operation Code (B7H) 1 Logical Unit Number PList GList Defect List Format (0) 2 Reserved (0) 3 Reserved (0) 4 Reserved (0) 5 Reserved (0) 6 Allocation Length (MSByte) 7 Allocation Length 8 Allocation Length 9 Allocation Length (LSByte) 10 Reserved (0) 11 Reserved (0) Link Flag PList &GList A Primary List bit of 0 and a Grown List bit of 1 indicates the drive will return the contents of the Primary Defect List (PDL) and the Secondary Defect List (SDL). A PList bit of 1 and a GList bit of 0 indicates the drive will return the contents of 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. 2-142 Chapter 2