为系统及数据服务器上的操作系统、服务器设定、参数等资料建立卷影备份，存放到近端或远端的SAN存储阵列中。
It also create volume shadow copies for system and the server Settings, parameters and OS running on data servers, stored on near or far SAN.
在网络归档存储中，数据持有性检查(DPC)用来在实际文件访问发生之前实时地检测远端服务器是否仍然完好地持有文件。
Data possession checking (DPC) is used in networked archival storage to check in real time if the remote server holds a file intact before the actual access to the file occurs.
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