Controlling transportation of tape medium

摘要

High performance is obtained without preventing achievement of a target read data rate.;In a controller 16 of a tape drive, a command processing unit 41 receives a synchronization command, and a buffer management unit 42 passes data in a buffer to a channel input-output unit 43. Then, upon completion of writing the data to the tape, a backhitch determination unit 44 determines whether or not to execute backhitch. If it is determined that backhitch should be skipped, the speed determination unit 46 determines a tape speed that minimizes a sum of a time required to write data without backhitch within a range where a data amount of a monitor target is to be written in order to achieve a target read data rate, and a time required to write data with backhitch within the range. Then, an operation signal output unit 49 issues an instruction to change the tape speed to the determined tape speed after execution of backhitch.

主权项

1. An apparatus of controlling transportation of a tape medium during data writing to the tape medium, comprising:
a determination unit that performs operations comprising:
determining a length of idle transport for achieving a target read data rate in reading written data from the tape medium; anddetermining a speed for transporting the tape medium such that a portion of the tape medium transported without data writing due to skipping of backhitch has the determined length.