User's Guide
Table Of Contents
- SCSI Command Support
- SCSI Commands
- Initialize Element Status - 07h
- Initialize Element Status With Range - E7h
- Inquiry - 12h
- Log Sense - 4Dh
- Mode Select (6) - 15h
- Mode Select (10) - 55h
- Mode Sense (6) - 1Ah
- Mode Sense (10) - 5Ah
- Mode Pages
- Move Medium – A5h
- Persistent Reserve In – 5Eh
- Persistent Reserve Out – 5Fh
- Position to Element – 2Bh
- Prevent Allow Medium Removal – 1Eh
- Read Buffer – 3Ch
- Read Element Status – B8h
- Release Element (6) – 17h
- Release Element (10) – 57h
- Report LUNS – A0h
- Request Sense – 03h
- Request Volume Element Address - B5h
- Reserve Element (6) - 16h
- Reserve Element (10) - 56h
- Send Diagnostic - 1Dh
- Send Volume Tag - B6h
- Test Unit Ready (00h)
- Write Buffer (3Bh)
Quantum Scalar Intelligent Libraries SCSI Reference Guide Guide 75
Release Element (10) – 57h
What the Library Does With This Command
The library releases any outstanding reservation that had previously been made by the same initiator via
the RESERVE command. Only whole logical unit reservations are allowed; individual element reservations
are not supported.
This command is only supported if the library control path is provided by a tape drive.
Command Usage
This command should be used to release the library from any reservations previously made.
Release Element CDB Format
The RELEASE ELEMENT CDB format is shown in the following table.
3rdPrty – This field is not supported, and must be set to 0.
LongID – This field is not supported, and must be set to 0 as IDs greater than 255 are not supported.
Third Party Device ID – This field is required and used only when the 3rdPrty bit is set. Since the 3rdPrty
bit is not supported, this field must be set to 0.
Parameter List Length – This field is not supported, and must be set to 0.
Table 73 RELEASE ELEMENT CDB format
Bit
Byte
76543210
0 Op Code (57h)
1 Logical Unit Number 3rdPrty Reserved LongID
Rsvd
2 Reserved
3 Third Party Device ID
4
:
6
Reserved
7
:
8
MSB
Parameter List Length
LSB
9 Control