Disk Data Format

The SNIA Common RAID Disk Data Format (DDF) defines a standard data structure describing how data is formatted across disks in a RAID group. The DDF structure allows a basic level of interoperability between different suppliers of RAID technology. The Common RAID DDF structure benefits storage users by enabling in-place data migration or recovery after controller failure using systems from different vendors.[1]

References
  1. "Common RAID Disk Data Format (DDF)". SNIA.org. Storage Networking Industry Association.
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