Maxtor 10K V manual 17FORMAT Unit Defect Descriptor-Block Format

5.8.2.2FORMAT UNIT Defect Descriptor-Block Format

Each descriptor specifies a 4-byte defective sector address of the sector that contains the defect as shown in Table 5-17.

Table 5-17FORMAT UNIT Defect Descriptor-Block Format

Bit	7	6	5	4	3	2	1	0
Byte
0 - 3				Defective Block Address

5.8.2.3FORMAT UNIT Defect Descriptor — Physical Sector and Bytes From Index Format

The Physical Sector defect descriptor specifies the location of a defect that is the length of a sector. The Bytes From Index defect descriptor specifies the location of a defect that is no more than eight bytes long.

Each descriptor is comprised of the bytes shown in Table 5-18. The Cylinder Number of Defect is the most significant part of the address, and the Defective Sector Number or Defect Bytes From Index is the least significant part of the address. A value of FFFFFFFFh in bytes 4 to 7 is ignored

Table 5-18FORMAT UNIT Defect Descriptor- Physical Sector and Bytes

From Index Format

Bit	7	6	5		4		3	2	1	0
Byte
0 - 2				Cylinder Number of Defect
3					Head Number of Defect
4 - 7				Defective Sector Number
						or
				Defect Bytes from Index

5.8.2.4FORMAT UNIT Initialization Pattern Descriptor

The Initialization Pattern option specifies that the logical blocks on the drive medium will contain a specified initialization pattern. The Initialization Pattern descriptor is sent to the drive as part of the FORMAT UNIT parameter list. Table 5-19 describes the Initialization Pattern descriptors. The contents of the descriptor fields are described in Table 5-20 and the types in Table 5-21.

Table 5-19FORMAT UNIT Initialization Pattern Descriptor-Data Format

Bit	7	6	5	4		3		2	1	0
Byte
0	IP Modifier = 0						Reserved
1					IP Type
2 - 3					IP Length
4 - n					IP

Maxtor Atlas 10K V 5-17