Filter
Top Products
Command Specifications
228 C141-C013
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 HDD 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 HDD executes format processing according to the
values specified in the various control flags.
− DPRY (disable primary)
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.
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)
0: Specifies that data block verification be performed after
initialization of the disk media. The HDD 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 G 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.