| 摘要 |
An integrated NAS and CAS storage system and method. System includes NAS and CAS devices and NAS and CAS clients. NAS device includes a NAS head for file sharing, and a storage system providing disk volume to store files. CAS device includes CAS head for archiving files, and a storage system providing disk volume to store archived files. CAS client includes archive AP for migrating files from NAS device to CAS device for archiving, and generating stub data indicating destination file path of archived data. When NAS client accesses stub data, NAS device receives data from CAS device and sends the data to NAS client. When NAS client accesses stub data as backup server, NAS device merely sends stub data to NAS client. NAS device employs methods of classifying the access type from NAS client, as normal NAS access or special NAS access for backup operation.
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