Product manual

3.4.4.4 Defect descriptor—bytes-from-index format
Defects are specified in the bytes-from-index format when the defect list
format field is 100
Binary
. See byte 1 of the Format Unit command in
Section 3.4.4.
Each defect descriptor in the
bytes-from-index format specifies the
beginning of a single-byte defect location on the disc. Each defect
descriptor is comprised of the cylinder number of the defect, the head
number of the defect, and the number of bytes-from-index to the defect
location. The defect descriptors are always listed in ascending order.
A value for defect bytes-from-index of FFFFFFFF
H
(which means reas-
sign the entire track) is illegal.
The information in the following table is repeated for each defect.
Bit
Byte
7 6 5 4 3 2 1 0
0–2 Cylinder number of defect
3 Head number of defect
4–7 Defect bytes-from-index
40 ST3655 Family SCSI Drives Product Manual, Rev. A