Mode Select (6)
Julyl 2017 Command Set 77
Element Address Assignments
An initiator can modify the element addresses in the library using a Mode Select
command. The four element types are:
• Medium transport (the hand)
• Storage element (storage cells)
• Import/export (mailslot cells)
• Data transfer (tape drives)
Each element type is defined as a range of consecutive elements based on a starting
element and a count. The ranges may be configured in any order, but one element
type range may not overlap another element type range, and gaps between ranges
are allowed.
To change the element address assignments, an initiator should first perform a Mode
Sense of mode page 1Dh (Element Address Assignment Page). This provides the
count of each element type. The count of each element type cannot be changed and
must be used as obtained from the Mode Sense command. Only the starting element
number can be modified. The initiator must calculate the starting addresses of each
type to ensure no overlaps.
Because the library supports the saved page function, the element address
assignments can be saved in non-volatile memory. These values are used to configure
the library:
• During power-on
• After a logical unit reset
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