- Veeam Immutable Backups are the equivalent of “air gapped,” tape, or WORM backups! Immutable Backups are accomplished through the use of a Linux repository server, the XFS filesystem (to support Fast Clone), one-time-use credentials, and the immutability flag which is a property of just about any Linux filesystem.
- Other Linux file systems offer immutability, but only XFS also supports *reflink*, a technology that allows for very fast cloning of files.Veeam has assigned *reflink* its own label, Fast Clone, and have specified this as a requirement for an immutable repository. The ReFS file system of Windows also supports reflink, but not immutability. XFS can set an extended file attribute[i] which will ...
- immutable repositories, this limits your choice to the classic forward incremental backup with periodic full backups. This makes XFS the ideal file system for such repositories, thanks to the spaceless synthetic full technology delivered by our advanced XFS integration (a v10 feature). Expanded Object Storage Support
- XFS can set an extended file attribute [i] which will protect the file from renaming, modification, deletion or hard-linking. The key point is that backups are transferred and written with non-privileged accounts and the immutable attribute is set and removed by a privileged service on the repository server which cannot be accessed from outside.