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3.3 Format Commands
C141-E167
3 - 79
a. Header
The top of the format parameter transferred from the INIT is a 4-byte header. The INIT can
specify the method used for defect processing that is executed by this command by control flags
within the header.
• FOV (format option valid)
0: Indicates that the INIT does not specially specify concerning the functions specified by
the control flags in bits 6 to 4 of byte 1 (see following “DPRY” to “STPF”.). The IDD
executes format processing in accordance with the default values of the various control
flags. If the INIT specifies “0” in this bit, “0” must be specified in all the control flags
in bits 6 to 4 of byte 1.
1: Indicates that the INIT is clearly specifying the functions specified by the control flags
in bits 6 to 4 of byte 1 (see following “DPRY” to “STPF”.). The IDD executes format
processing according to the values specified in the various control flags.
• DPRY (disable primary): Default value: “0”
0: Specifies execution of format processing using the P List. Alternate blocks are
allocated as substitutes for sectors in which defects registered in the P List exist, and
logical data blocks are not positioned there.
1: Specifies use of the P List in defect processing. Even if this value is specified, the P
List itself is saved without being erased.
Note:
When the disk media is being initialized for normal operation, the P List must by all
means be used. Therefore, “0” should be specified in this bit.
• DCRT (disable certification): Default value: “0”
0: Specifies that data block verification be performed after initialization of the disk
media. The IDD confirms that all logical data blocks can be read from normally after
initialization is completed. Any defective data blocks detected in this verify operation
are registered as a C List and alternate blocks are allocated for those data blocks.
1: Indicates that data block verify operations are prohibited after initialization of the disk
media.
• STPF (stop format): Default value: “1”
When the defect list (P List or G List) necessary for executing the defect processing
specified in this command, cannot be read from the disk media, this bit indicates whether to
continue (“0” is specified) or terminate (“1” is specified) command processing, but in the
IDD, this bit’s specification is disabled, and the specified value is disregarded. When the
necessary defect list cannot be read, this command is terminated with a CHECK
CONDITION status. The sense data at this time indicate “MEDIUM ERROR [=3] /
Primary defect list not found [=1C-01]” or “MEDIUM ERROR [=3] / Defect list error in
primary list [=19-02],” if the P List cannot be read and “MEDIUM ERROR [=3] / Grown
defect list not found [=1C-02]” or “MEDIUM ERROR [=3] / Defect list error in grown list
[=19-03],” if the G List cannot be read.