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Is there an existing issue for this?

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Is your feature request related to a problem? Please describe.

Presently, a single volume restricts all its files to a single storage medium, making it impossible to differentiate between HDD and SSD replicas at the lower level. As a result, the system cannot meet the requirement to store different files on distinct types of storage media, such as SSDs for frequently accessed data and HDDs for less frequently accessed data.

Describe the solution you'd like.

The system supports heterogeneous storage media within a single volume, enabling files to be stored on HDD, SSD, or erasure-coded (EC) storage. Although each file resides on only one type of medium at any given time, users experience seamless access to all files within the same volume, irrespective of the underlying storage medium.

Describe an alternate solution.

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Anything else? (Additional Context)

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