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Below is the Command Descriptor Block for the Format command.
Format Command CDB
User Defect List Type and Defect List Format.
BYTE OFFSET
VALUE COMMENTS
0 04 Command code
1 (Note 1) LUN is inserted, FMT data,
CMP
list, defect list format
200Reserved
300Reserved
4 (Note 2) Interleave
5 00 Control byte: no link, no flag
NOTES:
1. FMT data (bit 4) is always = 1. CMP list bit is taken
from the CL bit in the user format packet byte offset
$14. Defect list format (bits 2-0) depend on the defect
list type supplied by the user.
Below is a table of user defect list type and defect list
format.
DEFECT LIST
DEFECT LIST TYPE
FORMAT (BITS 2-0)
Type 0 (logical block number) 0 0 0
Type 1 (head, cylinder, 1 0 1
sector within track)
Type 0 (head, cylinder, 1 0 0
bytes from index)
2. Interleave is taken from the user packet byte offset $0E.