Product manual

3.4.4 Format Unit command (04

)

The Format Unit command formats the disc so that all of the user-ad-

dressable data blocks can be accessed. In addition, the disc can be

certified and control structures can be created for managing the disc and

defects.

If the specified logical unit is reserved, the Format Unit command is

rejected with a reservation conflict status. Extent reservations are not

supported. See Section 3.4.11 for more information about reservations.

The initiator can specify (or not specify) sectors to be reallocated during

the formatting process.

Bit

Byte

7 6 5 4 3 2 1 0

0 0 0 0 0 0 1 0 0

1 LUN

Fmt

Data

Cmp

lst

Defect list format

2 0 0 0 0 0 0 0 0

3–4 Interleave

5 0 0 0 0 0 0 Flag Link

Byte 1 The

Fmt Data (format data)

bit, the

Cmp lst (complete list)

bit, and the

defect list format

field are described in Sec-

tion 3.4.4.2.

Bytes 3–4 If the

interleave

field is not supported, it can contain any

value. However, the drive always formats the disc with an

interleave of 1:1.

36 ST3655 Family SCSI Drives Product Manual, Rev. A