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
Read Element Status Command (B8h)
Quantum SuperLoader 3 Software Interface Guide 106
Table 49 Medium Transport
Element Descriptor
Field Name Description
Element Address Specifies the address of the media changer element whose status is
reported by this element descriptor block.
Except An exception bit of 0 indicates the element is in a normal state. If this bit is
1, information on the abnormal state may be available in the
Additional
Sense Code
and Additional Sense Code Qualifier fields.
Full When set to 1, indicates that the element contains a unit of media. A value
of zero indicates that the element does not contain a unit of media. When
the
Except bit is one, the value of the Full bit is not valid.
Additional Sense
Code
Provides specific information on an abnormal element state. The values in
this field are as defined for the
Additional Sense Code field of REQUEST
SENSE
command response data. This field is valid only if the Except bit is
one.
Additional Sense
Code Qualifier
Provides more detailed information on an abnormal element state. The
values in this field are as defined for the
Additional Sense Code Qualifier
field of
REQUEST SENSE command response data. This field is valid only if
the
Except bit is one.
SVALID When set to 1, indicates that the
Source Storage Element Address field and
the
Invert bit information are valid. A value of zero indicates that the values
in these fields are not valid.
Invert This field is sent as 0. Inverting and rotating of media is not supported.
Source Storage
Element Address
Provides the address of the last storage element this unit of media
occupied. This field is valid only if the
SVALID bit is one.
Primary Volume
Tag Information
This field contains the bar code label information of the media currently
stored in this element. This is only included if
VOLTAG was set and label
information is available. In which case, the
PVOLTAG field shall be set on
the
Element Status page header.
Code Set This field is 0.
Identifier Type This field is 0.
Identifier Length This field contains the length in bytes of the
Identifier field.