The WAFL (Write Anywhere File Layout) file system is at the core of NetApp’s ONTAP operating system. Its primary function is to enable efficient, high-performance data storage by allowing data blocks to be written anywhere on the disk. This flexibility ensures that ONTAP can support features like snapshots, cloning, and fast replication without impacting system performance.

WAFL manages data consistency through a combination of metadata updates and consistency points, which help maintain integrity even during sudden shutdowns or failures. This structure also supports seamless integration with RAID protection, making it a robust and reliable solution for enterprise data environments.

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