Locate 2Bh - Sony DDS-4 Product Description Manual

6. COMMAND SPECIFICATION

6. 04 LOCATE 2Bh

Bit 7
Byte
0
1 Logical Unit Number
2
3 (MSB)
4
5
6
7
8
9 Unused (00b)
LOCATE command causes the target to position the logical unit to the specified block address in a specified partition.
Upon completion, the logical position shall be before the specified location. Prior to performing the locate operation, the
target shall ensure that all buffered data, filemarks, and setmarks have been transferred to the medium.
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 target shall not return status until the locate operation has
completed. An Immed bit of one indicates that the target 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 target shall position the medium based on the
current setting of the BT bit.
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.
6 5 4
Operation Code (2Bh)
Block Address
3 2
Reserved BT (0)
Reserved
Reserved
Partition
Reserved
SONY SDT-10000/SDT-11000 DDS Tape Drive
LOCATE
1 0
CP Immed
(LSB)
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