186 Configuring the Library
6 In the Choose Policy Settings dialog box:
• Select whether or not to enable Media Type Checking. With a valid media type identifier present
and the Media Type Checking setting enabled, which it is by default, a host is prevented from
executing invalid media moves across differing media types. For example, a host can be prevented
from moving LTO-3 media to an LTO-2 drive. If an invalid move is attempted, an error is returned
to the host.
Regardless of whether or not partition media policies are enabled or disabled, the library always
prevents host move-media commands that cross different media domains. For example, the library
will never execute a host command to move an LTO cartridge from an LTO drive to a DLT storage
slot, and vise versa.
•For Media Checking Policy, choose either Required or Not Required.
In Required mode, if the library does not find a valid media ID on a cartridge, the library does not
allow it to be moved into or within the library. If the library finds a valid media ID, the library allows
it to be moved from an I/E station into a partition that contains magazines matching the media
domain of the cartridge (for example, LTO), but the library does not allow the cartridge to be moved
from storage to a drive that does not have a matching type (for example, an LTO-2 cartridge will
not be allowed to move to an LTO-1 drive).
In Not Required mode, if the library does not find a valid media ID on a cartridge, the library allows
it to be moved into or within the library as long as the I/E station magazine, storage magazine, or
drive matches the media domain of the cartridge. If the library finds a valid media ID, the library
does not allow the cartridge to be moved from storage to a drive that does not have a matching type
(for example, an LTO-2 cartridge will not be allowed to move to an LTO-1 drive).
• Configure the Return Media Identifier. With the Return Media Identifier setting, you can control if
and where a media type identifier appears in the volume serial number that is returned to the host.
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