4.3 SCSI Commands

4.3.21 FORMAT UNIT command

Table 4.60 FORMAT UNIT command

Bit

7

6

5

 

4

3

 

2

 

1

 

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

Operation Code (04h)

 

 

 

 

 

1

 

LUN

 

 

FmtData

CmpList

 

 

Defect List Format

 

2

 

 

 

Reserved

 

 

 

 

0

 

0

 

 

 

 

 

 

 

 

 

 

 

3-4

 

 

 

 

Interleave

 

 

 

 

 

5

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The FORMAT UNIT command physically formats media according to the specified parameter values.

If the FmtData bit is 1, a FORMAT UNIT parameter list must be transferred. The command ignores Defect List Format. If the FmtData bit is 0, the command formats the media according to the internal default values without transferring a FORMAT UNIT parameter list. The command ignores the CmpList bit.

The command always uses the internal default value for Interleave even if a value is specified for it.

Table 4.61 FORMAT UNIT parameter list

Bit

7

 

6

5

4

 

3

2

 

1

 

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0-3

 

 

 

 

Defect List Header

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 4.62 Defect List Header

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

7

 

6

5

4

 

3

2

 

1

 

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

Reserved

DCRT

 

Reserved

 

 

IMMED

 

Reserved

2-3

 

 

 

 

Defect List Length

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If the Disable Certification (DCRT) bit is 1, the ODD formats the media without checking it. If the Immediate (IMMED) bit is 1, the ODD responds with end of processing immediately after command reception and before formatting is completed. The Ready bit of the Status register is set to 0 during formatting and set to 1 at the completion of formatting.

Defect List Length must be set to 0. If a value other than 0 is specified, the command assumes that 0 was specified.

C156-E224-01EN

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Fujitsu MCJ3230SS manual Format Unit command, Format Unit parameter list, Defect List Header