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InfiniBand, NVMe over InfiniBand or NVMe/IB [57] The standard for NVMe over Fabrics was published by NVM Express, Inc. in 2016. [58] [59] The following software implements the NVMe-oF protocol: Linux NVMe-oF initiator and target. [60] RoCE transport was supported initially, and with Linux kernel 5.x, native support for TCP was added. [61]
NVMe over Fabrics refers to the ability to utilize NVMe protocol over existing network infrastructure like Ethernet (Converged or traditional), TCP, Fibre Channel or InfiniBand for transport (as opposite to run NVMe over PCI). NVMe is SAN block level data storage protocol.
NetApp FAS3240-R5. Modern NetApp FAS, AFF or ASA system consist of customized computers with Intel processors using PCI.Each FAS, AFF or ASA system has non-volatile random access memory, called NVRAM, in the form of a proprietary PCI NVRAM adapter or NVDIMM-based memory, to log all writes for performance and to play the data log forward in the event of an unplanned shutdown.
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Disaggregated storage is a form of scale-out storage, built with some number of storage devices that function as a logical pool of storage that can be allocated to any server on the network over a very high performance network fabric. Disaggregated storage solves the limitations of storage area networks or direct-attached storage.
Windows 8.1 and later Windows operating systems support the TRIM command for NVM Express SSDs. Microsoft has released an update for Windows 7 that adds NVM Express support including TRIM for PCIe SSDs. [45] [46] TRIM is known to be supported for ReFS and NTFS, both of which implement a DisableDeleteNotify switch for disabling it. [47]
Hard disk drives are accessed over one of a number of bus types, including parallel ATA (PATA, also called IDE or EIDE; described before the introduction of SATA as ATA), Serial ATA (SATA), SCSI, Serial Attached SCSI (SAS), and Fibre Channel.
For example, few external drives connected via USB and FireWire correctly send S.M.A.R.T. data over those interfaces. With so many ways to connect a hard drive (SCSI, Fibre Channel, ATA, SATA, SAS, SSA, NVMe and so on), it is difficult to predict whether S.M.A.R.T. reports will function correctly in a given system.