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Definition: NetApp Filer

A family of network attached storage (NAS) appliances from Network Appliance that are highly scalable to terabytes of data. NetApp Filers are high-performance, mission critical products used by large enterprises and service providers. Filers use Network Appliance's innovative Data ONTAP microkernel OS and Write Anywhere File Layout file system (WAFL). See NAS and SAN.

A NetApp Filer
Network attached storage (NAS) devices such as this one can hold terabytes of storage and provide mission critical reliability for large enterprises. (Image courtesy of Network Appliance, Inc.)