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101

SCSI-2 Drive Command Set

Seek (Group 0) Command (0BH)

Chapter 2 2-25

SCSI-2 Drive Commands

Seek (Group 0) Command (0BH)

This command seeks the optical head to the physical track where the

specified logical block exists.

PBA A Physical Block Address bit of 1 indicates that physical

block addressing is used.

A PBA bit of 0 indicates that logical block addressing is

used.

NOTE When this command is used with 512 byte/sector 4X/ 8X/14X media, 1024

byte/sector 8X/14X media, or 2048 14X media, it is not possible to address

all logical blocks on the disk because those media types contain >2

logical blocks.

NOTE When this command is used with 14X 512 or 1024 byte/sector media,

setting the PBA bit will cause the drive to return a CHECK CONDITION

status. The sense key/additional sense code will be set to ILLEGAL

REQUEST/INVALID FIELD in CDB.

Table 2-19 Seek (Group 0) Command CDB

Byte 7 6 5 4 3 2 1 0

0 Operation Code (0BH)

1 Logical Unit Number

(0)

Logical Block Address (MSByte)

2 Logical Block Address

3 Logical Block Address (LSByte)

4 Reserved (0)

5 PBA Reserved (0) Flag Link

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 377 378

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