Invention Grant
US08693129B2 Transport speed adjustment device, transport speed adjustment method and transport speed adjustment program for adjusting transport speed of tape medium
失效
运输速度调节装置，运输速度调节方法和运输速度调节程序，用于调节胶带介质的传送速度
- Patent Title: Transport speed adjustment device, transport speed adjustment method and transport speed adjustment program for adjusting transport speed of tape medium
- Patent Title (中): 运输速度调节装置，运输速度调节方法和运输速度调节程序，用于调节胶带介质的传送速度
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Application No.: US13458828Application Date: 2012-04-27
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Publication No.: US08693129B2Publication Date: 2014-04-08
- Inventor: Takashi Katagiri , Hirokazu Nakayama , Yutaka Oishi
- Applicant: Takashi Katagiri , Hirokazu Nakayama , Yutaka Oishi
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Griffiths & Seaton PLLC
- Priority: JP2008-177986 20080708
- Main IPC: G11B15/46
- IPC: G11B15/46
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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