Transport speed adjustment device, transport speed adjustment method and transport speed adjustment program for adjusting transport speed of tape medium
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United States of America Patent
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Apr 8, 2014
Issued Date -
N/A
app pub date -
Apr 27, 2012
filing date -
Jul 8, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A tape drive capable of switching the transport speed of a tape medium among multilevel speeds calculates a data transfer rate from/to a host device, and selects an adjustment mode of the transport speed of the tape medium from a constant speed mode and a speed switch mode according to the calculated data transfer rate. The tape drive in the speed switch mode, pauses a data write or read operation to switch the transport speed of the tape medium while data is written at a first transport speed and when an available capacity of a buffer memory reaches a data volume to be received from the host device during switching of the transport speed and is read out at the first transport speed and when a data volume of a buffer memory reaches a data volume to be transmitted to the host device during switching of the transport speed.
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