Fujitsu MAX3073NC - SCSI,80, Dell DC961,Hard Drive Scsi Logical Interface Specifications page 159

3. Even if defect data of the type specified in the CDB do not exist in the defect list (P List or G
List) (if the defect list is empty), "1" is displayed in the "PList" bit and the "GList" bit in the
header transferred to the INIT corresponding to the specification in the CDB.
4. By the INIT issuing this command specifying "4" in the "Transfer Byte Length" field in the
CDB, and by investigating the information in the header transferred by the IDD, it can know the
length (number) of data included in the P List and G List.
5. Depending on the combination of defect data type specifications and format specifications, the
following conditions exist concerning the transferred defect data, so caution is necessary.
Block Address Format
Byte Distance from the Index Format
Physical Sector Address Format
1) Regardless of the size of the User Space, all the defect position information for the disk
media other than the system space is reported. Defect position information is also reported
for areas which cannot be clearly accessed from the INIT, such as the spare sectors for
alternate blocks.
2) Logical data blocks which have undergone slip processing due to defective sectors, and
logical data blocks which have undergone alternate processing, are reported. Defect
position information is not reported for areas which cannot be clearly accessed from the
INIT (areas which do not have logical block addresses) such as cylinders and sectors, etc.
which are not used as User Space or CE Space.
3) The byte position which indicates the first byte in defective sector data is reported.
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.
C141-C010
Defect List Format
3.3 Format Commands
PList GList
2) 2)
1) 1), 3)
1) 1)
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