公开(公告)号：US20100251072A1

公开(公告)日：2010-09-30

申请号：US12813491

申请日：2010-06-10

申请人： James L. Hafner ,  Carl E. Jones ,  David R. Kahler ,  Robert A. Kubo ,  David F. Mannenbach ,  Karl A. Nielsen ,  James A. O'Connor ,  Krishnakumar R Surugucchi

发明人： James L. Hafner ,  Carl E. Jones ,  David R. Kahler ,  Robert A. Kubo ,  David F. Mannenbach ,  Karl A. Nielsen ,  James A. O'Connor ,  Krishnakumar R Surugucchi

IPC分类号： H03M13/05 ,  G06F11/10

CPC分类号： G06F11/1076 ,  G06F2211/1057

摘要： A RAID system is provided for detecting and correcting dropped writes in a storage system. Data and a checksum are written to a storage device, such as a RAID array. The state of the data is classified as being in a “new data, unconfirmed” state. The state of written data is periodically checked, such as with a timer. If the data is in the “new data, unconfirmed” state, it is checked for a dropped write. If a dropped write has occurred, the state of the data is changed to a “single dropped write confirmed” state and the dropped write error is preferably corrected. If no dropped write is detected, the state is changed to a “confirmed good” state. If the data was updated through a read-modified-write prior to being checked for a dropped write event, its state is changed to an “unquantifiable” state.

摘要翻译： 提供了一种RAID系统，用于检测和纠正存储系统中丢弃的写入。 将数据和校验和写入存储设备，如RAID阵列。 数据的状态被分类为“新数据，未确认”状态。 周期性地检查写入数据的状态，例如使用定时器。 如果数据处于“新数据，未确认”状态，则检查是否丢弃写入。 如果发生了丢弃的写入，则将数据的状态改变为“单个丢弃的写入确认”状态，并且优选地校正丢弃的写入错误。 如果没有检测到丢弃的写入，则状态被改变为“已确认的”状态。 如果在检查丢失的写入事件之前通过读取 - 修改 - 写入更新数据，则其状态将更改为“无法量化”状态。