Data storage device using predefined data segments for logical address mapping

A data storage device configured to access a magnetic tape comprising a plurality of data tracks, the data storage device comprising:

• at least one head configured to access the magnetic tape;
• and
• control circuitry configured to:
• define a predetermined number of data segments per data track,
• receive a read command comprising a logical address corresponding to a logical data block stored in a target data segment of a target data track,
• locate a target segment entry in a mapping table corresponding to the logical address of the read command, the mapping table having a predetermined number of segment entries per data track, wherein:
• each segment entry corresponds to a data segment of a plurality of data segments of the data track, the data segment storing one or more logical data blocks, and
• each segment entry has a single logical address corresponding to a first logical data block of the one or more logical data blocks stored in the corresponding data segment,
• seek the head to a beginning of the target data segment of the target data track, and
• read from the beginning of the target data segment in order to search for the logical data block corresponding to the logical address in the read command.

A data storage device configured to access a magnetic tape comprising a plurality of data tracks, the data storage device comprising:

• at least one head configured to access the magnetic tape;
• a means for defining a predetermined number of data segments per data track;
• a means for receiving a read command comprising a logical address corresponding to a logical data block stored in a target data segment of a target data track;
• a means for locating a target segment entry in a mapping table corresponding to the logical address of the read command, the mapping table having a predetermined number of segment entries per data track, wherein:
• each segment entry corresponds to a data segment of a plurality of data segments of the data track, the data segment storing one or more logical data blocks, and
• each segment entry has a single logical address corresponding to a first logical data block of the one or more logical data blocks stored in the corresponding data segment,
• a means for seeking the head to a beginning of the target data segment of the target data track;
• and
• a means for reading from the beginning of the target data segment in order to search for the logical data block corresponding to the logical address in the read command.