The disk layout is the way file system information is stored on disk. On Veritas File System (VxFS), several disk layout versions, numbered 1 through 10, were created to support various new features and specific UNIX environments.

Currently, only the Version 7, 8, 9, and 10 disk layouts can be created and mounted. The Version 6 disk layout can be mounted, but only for upgrading to a supported version. No other versions can be created or mounted.

See About Veritas File System disk layouts.