发明授权
US08259405B2 Rewriting codeword objects to magnetic data tape upon detection of an error
有权
检测到错误时将码字对象重写到磁数据磁带
- 专利标题： Rewriting codeword objects to magnetic data tape upon detection of an error
- 专利标题（中）： 检测到错误时将码字对象重写到磁数据磁带
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申请号： US12351756申请日： 2009-01-09
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公开(公告)号： US08259405B2公开(公告)日： 2012-09-04
- 发明人: Roy D. Cideciyan , Thomas Mittelholzer , Paul J. Seger , Keisuke Tanaka
- 申请人： Roy D. Cideciyan , Thomas Mittelholzer , Paul J. Seger , Keisuke Tanaka
- 申请人地址： US NY Armonk
- 专利权人： International Business Machines Corporation
- 当前专利权人： International Business Machines Corporation
- 当前专利权人地址： US NY Armonk
- 代理商 Dan Shifrin
- 主分类号： G11B20/16
- IPC分类号： G11B20/16
摘要：
During a read-after-write operation on magnetic tape, a first SCO is formed which includes two encoded processed user data units and is one of T SCOs in a first SCO set. The user data units are each one of T user data units in first and second user data unit sets, respectively, within the first SCO set. The first SCO set is written to the magnetic tape and is immediately read. When an error is detected in one of the user data units, a second SCO is formed to include the first user data unit and, only if an error is not detected in a user data unit in the other user data unit set, to not include the other user data unit, the second SCO being one of T SCOs in a second SCO set. Then, the second SCO set is rewritten to a later position on the tape later.