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Typical DAS featuring USB and (legacy) Firewire connectors Typical NAS using ethernet for main connectivity. Direct-attached storage (DAS) is digital storage directly attached to the computer accessing it, as opposed to storage accessed over a computer network (i.e. network-attached storage).
The key difference between direct-attached storage (DAS) and NAS is that DAS is simply an extension to an existing server and is not necessarily networked. As the name suggests, DAS typically is connected via a USB or Thunderbolt enabled cable. NAS is designed as an easy and self-contained solution for sharing files over the network.
The above translates into different implementations for different uses. Here are some examples. An Internet service provider which provides network access via common modem or modem-like devices (be it PSTN, DSL, cable or GPRS/UMTS) can have one or more NAS (network access server) devices which accept PPP, PPPoE or PPTP connections, checking credentials and recording accounting data via back ...
DAS was the first network storage system and is still widely used where data storage requirements are not very high. Out of it developed the network-attached storage (NAS) architecture, where one or more dedicated file server or storage devices are made available in a LAN.
Some researchers have made a functional and experimental analysis of several distributed file systems including HDFS, Ceph, Gluster, Lustre and old (1.6.x) version of MooseFS, although this document is from 2013 and a lot of information are outdated (e.g. MooseFS had no HA for Metadata Server at that time).
OpenMediaVault (OMV) is a free Linux distribution designed for network-attached storage (NAS). [ 3 ] [ 4 ] The project's lead developer is Volker Theile, who instituted it in 2009. OMV is based on the Debian operating system, and is licensed through the GNU General Public License v3 .
NAS devices are normally listed either in Category:Server appliance or its subcategory Category:Home servers. In some cases, Category:Server hardware may be more appropriate. Companies which sell NAS devices or software for them should normally be listed in Category:Computer storage companies.
Company HQ Region HQ Country HQ City Agami Systems: North America: United States: Sunnyvale, California: Apple Inc: North America: United States: Cupertino, California
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