User's Guide
Table Of Contents
- Preface
- Theory of Operation
- Media Changer Commands
- Overview of Command and Status Processing
- Media Changer Command Descriptions
- Initialize Element Status Command (07h)
- Inquiry Command (12h)
- Load Unload Command (1Bh)
- Log Sense Command (4Dh)
- Mode Select (6) / (10) Command (15h / 55h)
- Mode Sense (6) / (10) Command (1Ah/ 5Ah)
- Move Medium Command (A5h)
- Persistent Reserve In Command (5Eh)
- Persistent Reserve Out Command (5Fh)
- Position to Element Command (2Bh)
- Prevent/Allow Medium Removal (1Eh)
- Read Buffer Command (3Ch)
- Read Element Status Command (B8h)
- Release Element (10) Command (57h)
- Release Unit (6) Command (17h)
- Report Device Identifier Command (A3h)
- Report LUNS Command (A0h)
- Request Sense Command (03h)
- Reserve Element (10) Command (56h)
- Reserve Element (6) Command (16h)
- Send Diagnostic Command (1Dh)
- Set Device Identifier Command (A4h)
- Test Unit Ready Command (00h)
- Write Buffer Command (3Bh)
- Index
Chapter 2 Media Changer Commands
Test Unit Ready Command (00h)
Quantum SuperLoader 3 Software Interface Guide 139
Test Unit Ready Command (00h)
The TEST UNIT READY command checks the media changer to ensure that
the unit is ready for commands involving cartridge movement. If the
media changer has successfully completed its initialization process and
the unit is not in an error state, the command returns a
GOOD status.
Otherwise,
CHECK CONDITION is reported. Some conditions that would
cause a
CHECK CONDITION include over temperature, no magazines
installed, or user access via front panel or On-board Remote Management
interfaces.
Due to power cycle and code update, it is possible to get multiple check
conditions on a
TEST UNIT READY command.
Figure 82 Test Unit Ready
Descriptor
Bit
Byte76543210
0
Operation Code (00h)
1
Logical Unit Number Reserved
2 - 4
Reserved
5
Unused Reserved Flag Link