发明公开
EP1131823A2 A METHOD OF REACQUIRING CLOCK SYNCHRONIZATION ON A NON-TRACKING HELICAL SCAN TAPE DEVICE
有权
方法恢复从上的时钟同步轨道地段倾斜磁道磁带驱动器
- 专利标题: A METHOD OF REACQUIRING CLOCK SYNCHRONIZATION ON A NON-TRACKING HELICAL SCAN TAPE DEVICE
- 专利标题(中): 方法恢复从上的时钟同步轨道地段倾斜磁道磁带驱动器
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申请号: EP99961684.0申请日: 1999-11-16
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公开(公告)号: EP1131823A2公开(公告)日: 2001-09-12
- 发明人: BLATCHLEY, Michael, A. , MCAULIFFE, Richard, H.
- 申请人: Ecrix Corporation
- 申请人地址: Craig Lamborn,5525 Central Avenue Boulder, CO 80301 US
- 专利权人: Ecrix Corporation
- 当前专利权人: Ecrix Corporation
- 当前专利权人地址: Craig Lamborn,5525 Central Avenue Boulder, CO 80301 US
- 代理机构: Schoppe, Fritz, Dipl.-Ing.
- 优先权: US192808 19981116
- 国际公布: WO0030108 20000525
- 主分类号: G11B20/18
- IPC分类号: G11B20/18 ; G11B20/14
摘要:
A method and apparatus for reacquiring synchronization of a clock synchronization signal (58) with a data signal (60) in a non-tracking storage device is presented. A packet error detector (46) detects errors in data packets (55) from a data signal (60) and generates a packet error status (56) for each reconstructed packet (55). A read quality detector (42) monitors the packet error status (56) and determines whether the quality of the data signal (60) is of an acceptable versus unacceptable read quality condition. The read quality condition is based on the number of consecutive packets in which an error is detected. Upon detection of an unacceptable read quality condition, the read channel is disabled and the clock synchronize signal (58) is relocked to a known reference frequency (54). The read channel is then reenabled and the clock synchronization signal (58) is relocked to the data signal (60).
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