User's Guide

Commands: Report Density Support (44h) Page 127
10-byte version:
Byte
Bits
7 6 5 4 3 2 1 0
0 0 1 0 1 0 1 1 1
1 0 0 0 3rd Pty 0 0 LongID* 0
2 0 0 0 0 0 0 0 0
3 Third-Party Device ID
4 0 0 0 0 0 0 0 0
5 0 0 0 0 0 0 0 0
6 0 0 0 0 0 0 0 0
7 Parameter List Length (MSB)*
8 Parameter List Length (LSB)*
9 vendor unique* 0 0 0 0 Flag Link
* These fields must be set to zero.
Command Descriptor Block Field Description
The following table defines the fields in the CDB.
Field
Name Bytes Bits Description
3rd Pty bit 1 4 The Third Party bit indicates when a release is for a third party.
3rd Pty ID 1 1-3 The Third Party ID specifies a device ID for which the release was
intended. This field is meaningful only when the 3rd Pty bit is set to 1.
The drive does not release a third party reservation if this field does not
identify the device for which the drive is currently reserved.
Completion Status
The Completion Status for the RELEASE UNIT command is shown in the following
table.
Code Message Description
00h Good
Status
• The drive is ready to perform any appropriate command.
• The drive remains in any previously set mode.
• The drive accepts commands from any Initiator.
• The tape position is not changed.
02h Check
Condition
Extended Sense Byte 02h:
Code Message Description
04h Hardware Error Drive hardware failure detected.
05h Illegal Request The CDB contains an invalid bit.
06h Unit
• Cartridge was changed prior to accepting
Attention this command
• The drive was reset prior to this command.