Command Specifications

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.

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Fujitsu MBA3300RC, MBC2036RC, MBC2073RC, MBA3147RC, MBA3073RC specifications Command Specifications