User Manual

SCSI Commands Reference Manual, Rev. J 216

www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)

3.45 SEEK EXTENDED command

This command has been declared obsolete by the T10 committee. However, it is included because it may be implemented on

some products.

The Seek Extended command (see table 186) requests that the disk drive seek to the specified logical block address.

This command is implemented with the disk drive specific parameters listed in Table 186.

LUN (Logical Unit Number) field

Seagate drives only support Logical Unit Number 0.

LOGICAL BLOCK ADDRESS field

Four byte Logical Address may be specified. The drive will seek to this address when the command is received. The maximum

Logical Block Address that may be specified for a Seek command is defined in Read Capacity Data (see 3.22.1 and 3.23.1). See

2.2.3 for the definition of the LOGICAL BLOCK ADDRESS field.

CONTROL byte

The CONTROL field is described in clause 2.2.7.

Table 186 SEEK command (2Bh)

Bit

Byte

7 6 5 4 3 2 1 0

OPERATION CODE (2Bh)

LUN Reserved

LOGICAL BLOCK ADDRESS (MSB)

. . .

LOGICAL BLOCK ADDRESS (LSB)

Reserved

CONTROL