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Page 70
PARK UNPARK
Command Descriptor Block
Field Descriptions
Completion Status
The Park Unpark command with the park bit set requests that the drive park the load
arm in preparation for transport.
The Park Unpark command with the park bit not set requests that the drive load arm
be unparked. This is not usually necessary as the drive automatically unparks on
power up.
In either case, attempting to issue this command while the medium is present will
result in a vendor specific check condition of MEDIUM_IS_PRESENT (09/80/80).
The Park Unpark command is a vendor unique command.
Bits
Byte
7
6
0
1
Ignored LUN
2
3
4
Reserved
5
Field
Bytes
Operation
0
Code
Ignored
1
Logical
Unit
Park
4
Reserved
Control
5
Code
Message
00h
Good Status
02h
Check Condition
5
4
3
Operation Code (06h)
Reserved
Reserved
Control
Bits
Description
The Operation Code for Park Unpark is 06h.
5-7
The LUN field is residual from the SCSI-1 days and is ig-
nored.
0
0b = Requests the drive to be unparked.
1b = Requests the drive to be parked.
All reserved bits must be 0.
See Control Byte Format on page 18.
Description
• The drive is ready to perform any appropriate command.
• The drive remains in any previously set mode.
• The tape position is not changed.
Use the Request Sense command to retrieve status information. Possi-
ble Sense Keys are:
Code
Message
04h
Hardware Error
05h
Illegal Request
06h
Unit Attention
09h
Medium Present
LTO SCSI Interface Manual
2
1
0
Reserved
Park
Description
Drive hardware failure.
The Command Descriptor Block is invalid.
The cartridge was changed, or the drive
was reset prior to this command.
Cannot park drive with medium present.
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