Quantum Scalar Distributed Library Controller 2.7, Reference Manual, Page: 147 / 324

Scalar DLC Reference Guide 129
Media Rules
The physical library cannot always correctly identify the cartridge media type by recognizing its barcode
label (especially for the old models of barcode readers). The media domain is always recognized correctly,
the media type is not. In such cases the un-recognized volser receives the media type as default to the slot
where it has been found during
Inventory .
However, this may lead to incorrect assignment of media type to cartridge, and that can even lead to a
hardware crash (for example, if the SDLT cartridge has been mis-identified as DLT III and mounted to the
Quantum DLT 4000 drive).
To improve the situation, a Media rules feature has been provided so the Scalar DLC administrator can
assign a correct media type to the range of volsers. The typical rule is, “if the cartridge is in the specified
volser range and has the specified media domain, check whether it has the specified media type“. The
volser ranges specified in different rules cannot overlap by media domain (that means, two rules cannot
have both same media domain and overlapped volser ranges). See
Figure 94 on page 129.
Also refer to Media Types on page 263 and Drive Types on page 266.
Figure 94 Media Rules
Note
The media rules do not work automatically and require the manual appliance and
confirmation.
CAUTION
The media rules feature should be used only by expert users. The incorrect
assignment of media type to cartridge can cause a hardware crash.