Format Unit Command Defect Processing - Fujitsu MAP3147 Scsi Logical Interface Specifications

boundaries (User Space), and is recorded as the G List, but formatting processing is
executed only for the User Space in the range specified in the "Block descriptor" and
"Format parameters" (Page 3), and the "Drive parameters" (Page 4) of the MODE SELECT
parameter.
3. If a defect descriptor in the "Byte distance from the Index format" is specified in the D List,
depending on the byte position of the specified defective byte, 1 sector may be processed as
a defective sector with 2 or more defect descriptors. Also, if the specified defective byte
position has no influence on data block read/write operations, that defect position
information is disregarded and is not the object of defective sector processing, and thus is
not recorded in the G List. Therefore, the defect position information specified in this
command may not necessarily coincide with the defect position information read with the
READ DEFECT DATA command after this command is terminated.
(4) Defect processing during initialization
Table 3.5 shows each combination of control flag specification values and the contents of processing
executed by the IDD.
concerning alternate block allocation processing methods.
Table 3.5
CDB Byte 1
FmtData CmpLst Defect
List
Format
0 – – – –
(Note 4)
1 0 d d d
(Note 1,
Note 2,
Note 3)
d d d
1 0
(Note 1,
Note 2,
Note 3)
1 1 d d d
(Note 1,
Note 2)
C141-E167
Furthermore, see Chapter 3 "Data Format" of the "Product Manual"
FORMAT UNIT command defect processing (1 of 3)
Header
FOV DPRY Defect
List
Length
(Format parameters not
transferred)
0 0 Zero
1 0
1 1 Zero
0 0 Zero
1 0
3.3 Format Commands
Defect Processing Method
Alternate block allocation is
performed for defects registered in
the P List.
The previously existing G List is
erased.
Alternate block allocation is
performed for defects registered
in the P List and the previously
existing G List.
The previously existing G List is
saved.
Alternate block allocation is
performed for defects registered in
the previously existing G List.
The P List is saved, but it is not
used in defect processing.
The previously existing G List is
saved.
Alternate block allocation is
performed for defects registered in
the P List.
The previously existing G List is
erased and it is not used in defect
processing.
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