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SCSI-2 Drive Command Set

Read Defect Data (Group 1) Command (37H)

Chapter 2 2-97

SCSI-2 Drive Commands

Defect List

Format This field specifies the defect list format that is

returned. Only the Physical Sector Format (5) is

supported. If the Block Format (0) is specified, the

defect list will be returned in Physical Sector Format

and a CHECK CONDITION status will be returned at

the completion of the command with the sense key/

additional sense code set to RECOVERED ERROR/

Defect List Not Available.

Allocation

Length This field specifies the number of bytes that the

initiator has allocated for the return of this data. A

length of 0 indicates that no data will be returned. This

condition is not considered an error. The drive will

terminate the data — in phase when the allocation

length has been transferred or when all available defect

data has been transferred to the initiator, whichever is

less.

PList A PList bit of 1 indicates the Primary List of defects was

returned.

GList A GList bit of 1 indicates the Grown List of defects was

returned.

Defect List

Format This field will be set to the Defect List format that was

indicated in byte 2 of the CDB, which specifies the

format of the Defect List data returned by the drive.

Defect List

Length This field specifies the length in bytes of the defect

descriptors (see Table 2-85 on page 2-98).

Table 2-84 Read Defect Data Defect List Header

Byte 7 6 5 4 3 2 1 0

0 Reserved (0)

1 Reserved (0) PList GList Defect List Format

2 Defect List Length (MSByte)

3 Defect List Length (LSByte)

1 2 ... 129 130 131 132 133 134 135 136 137 138 139 ... 377 378

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HP 220mx Guía de usuario Pagina 134