Write Anywhere File Layout
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The Write Anywhere File Layout is a proprietary file system that supports large, high-performance RAID arrays, quick restarts without lengthy consistency checks in the event of a crash or power failure, and growing the filesystems size quickly. Wikipedia
Data deduplication: Yes (FAS Dedup: periodic online scans, block based;)
File system permissions: UNIX permissions and ACLs
Max file size: up to 16 TB
Supported operating systems: ONTAP
Transparent encryption: Yes (since Ontap 9.1; possible with 3rd party appliances like Decru DataFort for older versions)