| 摘要 |
A method and system of reading data from a storage device. The storage device includes a plurality of physical storage extents. One or more of the storage extents is/are associated with a "void extent" indicator, a void extent being an extent that was the target of an unsuccessful write completion. In one technique a request is received to read the data from the storage device. The physical storage extent(s) on which the requested data is stored is located. If one of the located storage extents has an associated void extent indicator then a read error is returned. In a further technique, a request is received to read the data from the storage device. The physical storage extent(s) on which the requested data is stored is located. The data from the located storage extent(s) is retrieved if the read request is a diagnostic read and if the or one of the located storage extents has an associated void extent indicator. A read error is returned if the read request is a normal read, and if the or one of the located storage extents has an associated void extent indicator.
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