<p id="isPasted">Network-attached Storage (NAS) is a file-level computer data storage server connected to a computer network. It provides storage and access to data from a central location to several authorized network users and other groups of clients. These systems are commonly used to support shared applications, including engineering software builds, data logging, email systems, video recording and editing, business analytics, financial records, genomics data sets and much more.</p><p>The file systems are contained in one or more storage drives often arranged into logical, redundant storage containers. The NAS sizes are dependent on speed, scale, and budget requirements. Therefore, they can be anything from a single desktop system all up to multi-petabyte scale-out systems. NAS uses one or more file access protocols that are exposed to an internal network. These are then presented by protocols such as NFS (network file system) or SMB (server message block), or a proprietary high-performance protocol that allow clients to attach to the NAS. Similar to TCP/IP devices and other computers, the NAS acts as a network node, maintains its IP addresses, and can effectively communicate with other network devices.</p><p><br></p><p id="isPasted">Direct attached Storage (DAS) is digital storage that is directly connected to the system (i.e., a PC or a server) through an internal cable. The DAS system holds multiple hard disk drives in a single enclosure, which is directly connected to a machine through an HBA (Host Bus Adapter). Between these disk drives there is no network device (i.e., a switch, a hub, or a router, or network cable). For an individual PC user, the system’s hard disk is the standard form of DAS. However, in enterprises or businesses, the separate disk drives in one server and the drives external to that server are either attached directly or attached through Small Computer System Interface (SCSI), Serial Advanced Technology Attachment (SATA), or Serial Attached SCSI (SAS). Another limitation of DAS is that data cannot be shared with different servers or users.</p><p><br></p>
<p id="isPasted">Network-attached Storage (NAS) is a file-level computer data storage server connected to a computer network. It provides storage and access to data from a central location to several authorized network users and other groups of clients. These systems are commonly used to support shared applications, including engineering software builds, data logging, email systems, video recording and editing, business analytics, financial records, genomics data sets and much more.</p><p>The file systems are contained in one or more storage drives often arranged into logical, redundant storage containers. The NAS sizes are dependent on speed, scale, and budget requirements. Therefore, they can be …</p>