What is Network-Attached Storage (NAS) ?

Are you Exhausted from returning an external hard drive? Do you often need to access data from multiple machines on a network simultaneously? So it’s presumably time to get help from NAS.

NAS stands for Network Attached Storage. NAS devices are named NAS drives or NAS systems. Network-connected storage space is a centralized network subscription for use on a local area network. Other machines on the web can connect to the NAS to read and write data; It is as if the drive is connected directly to their computer. Accordingly, data is stored on a NAS and accessed through a network connection.

Networked-Attached storage space

NAS devices make it easy to share storage space between entire networks of computers and other devices. NAS system has many applications; These contain sharing shared documents, sharing group projects, playing media such as music and video, or backing up local machines.

Network Attached Storage space is created to be scalable and permits you to add or substitute drives in the absence of space with many answers. Some of these systems use multiple purposes in RAID (Multiple Array of Independent Disks) for sameness or speed; Others rely on a single drive for much smaller functions.

Features of NAS storage method

The essential components of the NAS storage method can be; Ease of access, high capacity, and relatively reasonable cost were noted. Nas storage devices are eligible for infrastructures that need local access to storage space and are used for archiving, backup, and cloud tiers.

NAS systems are network devices that include one or more storage drives, often arranged for local storage, redundant storage, or RAID. Network-attached storage destroys the responsibilities that other network servers had for files. Files are usually accessed using network shared file protocols such as SMB, NFS, and AFP. Since the mid-1990s, NAS devices have become famous for transferring files between multiple computers.

Advantages and Disadvantages of NAS Storage

NAS enables users to cooperate more and share data. It is precisely the opposite of DAS storage; It is particularly suitable for teamwork requiring remote communication or access from different areas. The NAS storage connects to the wireless router and delivers access to files and folders from any device connected to the network by facilitating access to and distribution of tasks. NAS environments are generally deployed in organizations as the basis for Personal / Private Cloud. In addition, to deliver more flexible and parallel backups, it is usually advised to use with cloud storage spaces.

Although accessing information simultaneously is a virtue, it can be problematic. Storage space on NAS equipment is based on HDDs used to handle data. Shuts down the system when Input / Output (I / O) requests of users become too standard at one time. This problem has been stopped in newer NAS systems by using faster flash storage, Tier along with hard disks, or All-flash settings.

NAS products are developed in large, medium, and small companies. Devices typically possess at least two Bay drives, although Single-bay systems are also unrestricted for non-critical data. NAS Enterprise with advanced components, designed to help manage storage with four Bay drives.

As storage capacity increased, NAS equipment was introduced with more or larger disks called Scale-up NAS (scalable NAS equipment) or blade scaled storage.

To transfer NAS traffic, it is used via TCP / IP protocol such as Ethernet to transfer data to storage. But in SAN, network traffic is sent through the FC protocol, specially designed for storage networks. SANs can also use the Ethernet-based iSCSI protocol instead of FC.

HDDs called NAS are similar in performance to other drives. Still, they may differ in firmware, vibration tolerance, and power excess, making them more suitable for use in RAID arrays, which are often implemented in NAS networks. They have applications.

For example; Some models of NAS drives support a Command Extension to disable longitudinal error recovery.

In a non-RAID application, a drive may take more effort to successfully read a problematic storage block, even if it takes several seconds. In a properly configured RAID array, a hard block on a drive can be fully encrypted via Redundancy and recovered in a RAID array.

If a drive spends several seconds re-executing a proposal, it may cause the RAID controller to show the drive is down; On the other hand, if it answers fast that Block Data has a Checksum Error, the RAID controller uses Redundant data on other drives to correct the error and keep working smoothly. These NAS SATA hard drives can be used as an internal hard drive of the computer, without any problems or the need for adjustment for compatibility, because it simply helps more and more options and maybe of a higher quality standard (Especially if it has a higher MTBF and a higher price).

Source:https://www.zoomit.ir/internet-network/377815-tim-flach-vulnerable-bird-portraits/