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6.Command Specification LOCATE
6-10 SONY AIT-5 drive SDX-1100V series Ver.1.0
6.4. LOCATE 2Bh
Bit
Byte
7 6 5 4 3 2 1 0
0 Operation Code (2Bh)
1 Reserved BT (0) CP Immed
2 Reserved
3 (MSB)
4 Block Address
5
6 (LSB)
7 Reserved
8 Partition (0)
9 Control
The LOCATE command causes the drive to position the logical unit to the specified block address in a specified
partition. Upon completion, the logical position will be after the specified location. Prior to performing the locate
operation, the drive will ensure that all buffered data, Filemarks, and Setmarks have been transferred to tape.
BT: A block address type (BT) bit of one is not supported and will 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 will not return status until the locate operation
has completed. An Immed bit of one indicates that the drive will return status as soon as all buffered commands
have completed execution and the CDB 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 will not be performed.
Block Address: The Block Address field specifies the block address to which the drive will 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 multi partition is not supported
by the drive. If set to non-ZERO, a check condition status is returned with a ILLEGAL REQUEST sense key.