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- ONTAP or Data ONTAP or Clustered Data ONTAP (cDOT) or Data ONTAP 7-Mode is NetApp's proprietary operating system used in storage disk arrays such as NetApp FAS and AFF, ONTAP Select, and Cloud Volumes ONTAP. With the release of version 9.0, NetApp decided to simplify the Data ONTAP name and removed the word "Data" from it, and remove the 7-Mode image, therefore, ONTAP 9 is the successor of Clustered Data ONTAP 8. ONTAP includes code from BSD Net/2 and 4.4BSD-Lite, Spinnaker Networks technology, and other operating systems.ONTAP originally only supported NFS, but later added support for SMB, iSCSI, and Fibre Channel Protocol (including Fibre Channel over Ethernet and FC-NVMe). On June 16, 2006, NetApp released two variants of Data ONTAP, namely Data ONTAP 7G and, with nearly a complete rewrite, Data ONTAP GX. Data ONTAP GX was based on grid technology acquired from Spinnaker Networks. In 2010 these software product lines merged into one OS - Data ONTAP 8, which folded Data ONTAP 7G onto the Data ONTAP GX cluster platform. Data ONTAP 8 includes two distinct operating modes held on a single firmware image. The modes are called ONTAP 7-Mode and ONTAP Cluster-Mode. The last supported version of ONTAP 7-Mode issued by NetApp was version 8.2.5. All subsequent versions of ONTAP (version 8.3 and onwards) have only one operating mode - ONTAP Cluster-Mode. NetApp storage arrays use highly customized hardware and the proprietary ONTAP operating system, both originally designed by NetApp founders David Hitz and James Lau specifically for storage-serving purposes. ONTAP is NetApp's internal operating system, specially optimized for storage functions at both high and low levels. The original version of ONTAP had a proprietary non-UNIX kernel and a TCP/IP stack, networking commands, and low-level startup code from BSD. The version descended from Data ONTAP GX boots from FreeBSD as a stand-alone kernel-space module and uses some functions of FreeBSD (for example, it uses a command interpreter and drivers stack). ONTAP is also used for virtual storage appliances (VSA), such as ONTAP Select and Cloud Volumes ONTAP, both of which are based on a previous product named Data ONTAP Edge. All storage array hardware includes battery-backed non-volatile memory, which allows them to commit writes to stable storage quickly, without waiting on disks while virtual storage appliances use virtual nonvolatile memory. Implementers often organize two storage systems in a high-availability cluster with a private high-speed link, either a Fibre Channel, InfiniBand, 10 Gigabit Ethernet, 40 Gigabit Ethernet, or 100 Gigabit Ethernet. One can additionally group such clusters under a single namespace when running in the "cluster mode" of the Data ONTAP 8 operating system or on ONTAP 9. Data ONTAP was made available for commodity computing servers with x86 processors, running atop VMware vSphere hypervisor, under the name "ONTAP Edge". Later ONTAP Edge was renamed to ONTAP Select and KVM was added as a supported hypervisor. (en)
- ONTAP（オンタップ）またはData ONTAP（データ・オンタップ）は、ネットアップのNAS装置で使用されているアプライアンスOS。 (ja)
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- ONTAP（オンタップ）またはData ONTAP（データ・オンタップ）は、ネットアップのNAS装置で使用されているアプライアンスOS。 (ja)
- ONTAP or Data ONTAP or Clustered Data ONTAP (cDOT) or Data ONTAP 7-Mode is NetApp's proprietary operating system used in storage disk arrays such as NetApp FAS and AFF, ONTAP Select, and Cloud Volumes ONTAP. With the release of version 9.0, NetApp decided to simplify the Data ONTAP name and removed the word "Data" from it, and remove the 7-Mode image, therefore, ONTAP 9 is the successor of Clustered Data ONTAP 8. (en)
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