liujun,

On the Windows OS, the Filter Frame is easy to develop driver for disk, volume态and filesystem. when I view some material about AVS, It's like a Volume Filter. But I am not sure:
1)  AVS is not depend on the upper filesystem ;
2)  The upper filesystem do not know the following AVS.

You analysis is correct. AVS as used for remote volume replication, volume snapshots, or both, as a filter driver on Solaris. Throughout AVS existence on Solaris, it has always been filesystem agnostic and volume manager independent.


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