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Mark Position Unknown
MPU
0
1
This will always be zero because Ultrium drives do not support multiple partitions.
Partition Number
Block Number
The number of logical blocks between BOP (beginning of partition) and the current logical
position. Filemarks count as one logical block each.
File Number
The number of filemarks between BOP and the current logical position.
Set Number
The number of setmarks between BOP and the current logical position.
118 Commands
The File Number and Set Number fields are valid.
Mark position is unknown. If set, then the File Number and Set Number fields are
undefined. This would be set only after a "hard" read error which resulted in the setting
of positioning error sense such as 3B00h (sequential positioning error).
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