Sony SDX-800V/R manual Locate 2Bh, Msb, Lsb

6.Command Specification LOCATE

6.4.LOCATE 2Bh

Bit	7	6	5	4		3	2	1	0
Byte
0				Operation		Code (2Bh)
1		Obsolete			Reserved		BT (0)	CP	Immed
2					Reserved
3	(MSB)			Block Address
4
5
6									(LSB)
7					Reserved
8					Partition
9					Control

LOCATE command causes the drive to position the logical unit to the specified block address in a specified partition. Upon completion, the logical position shall be after the specified location. Prior to performing the locate operation, the drive shall ensure that all buffered data, File-marks, and Set-marks have been transferred to tape.

BT: A block address type (BT) bit=1 is not supported and shall be set to ZERO otherwise a CHECK CONDITION with an ILLEGAL REQUEST sense key will be returned.

CP: A change partition (CP) bit of one indicates that a change to the partition specified in the partition field is to occur prior to positioning to the block specified in the block address field. A CP bit of ZERO indicates no partition change is to be made and the partition field is to be ignored.

Immed: An immediate (Immed) bit of ZERO indicates that the drive shall not return status until the locate operation has completed. An Immed bit of one indicates that the drive shall return status as soon as all buffered commands have completed execution and the command descriptor block of the LOCATE command has been validated. If CHECK CONDITION status is returned for a LOCATE command with an Immed bit of one, the locate operation shall not be performed.

Block Address: The Block Address field specifies the block address to which the drive shall be positioned on the tape.

Partition: The Partition field specifies which partition to select if the CP bit is one. Refer to the Mode Select command, Medium Partition page for additional information about partitioning. The partition is not support by the drive. If set to 1, a check condition status is returned with a ILLEGAL REQUEST sense key.

6-10 SONY AIT-3Ex drive SDX-800V series Ver.1.1