| 摘要 |
A data restoration method comprising determining whether a restoration process is in progress, in response to receiving a read request to read contents from a track on a source volume (ST[i]); reading data from ST[i], in response to determining that the restoration process is not in progress; determining whether the read request was originated from a host, in response to determining the restoration process is in progress; reading the data directly from ST[i], in response to determining the read request was not originated from a host; determining whether ST[i] is designated as remote with respect to the restore operation, in response to determining the read request was originated from a host; reading the data directly from ST[i], in response to determining ST[i] is designated as local; and reading the data from a track on a target volume (TT[i]), in response to determining ST[i] is designated as remote.
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