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4.3 Format Commands
C141-C013 243
6. The number of defects reported by this command differs depending on the
defect data format.
− When data are in the "Block Address Format," defect position
information is not reported for portions which cannot be clearly accessed
from the INIT.
− When data are in the "Block Address Format" or the "Physical Sector
Address Format," even if defects exist in multiple locations within that
sector, that defect information is reported by one defect descriptor.
− When data are in the "Byte Distance from the Index Format," all the
registered defect positions are reported when the P List is reported, but in
the case of the "Block Address Format" and the "Physical Sector Address
Format," the defect position information is not reported for defects which
do not have an influence on data block read/write operations.
− When data are in the "Byte Distance from the Index Format," when the P
List is reported, multiple defect position information may be reported for
a single sector, or 2 defective sectors may be reported as a single item of
defect position information due to defects which extend across sector
boundaries.
7. In defect data in the block address format, all the physical defect position
information on the disk media cannot be described universally. For example,
defect position information in areas without block addresses (spare sectors, or
cylinders which are not being used as User Space) cannot be described. The
defect data in this format are provided in order to preserve continuity with
previous specifications, but it is recommended that as much as possible, the
INIT not use the "Block Address Format."