Network Attached Storage

Network Attached Storage, commonly referred to as a NAS setup, is a file system attached to the network that acts solely as a storage center. NAS computers have all of the standard components of a computer such as a CPU, RAM, and hard drive. Instead of acting in the traditional server fashion, they act solely to hold data. NAS should not be confused with SAN which is means “storage area network.” SANs are separate networks that house the storage devices rather than all on the user’s current network.

How NAS connects to the Network

NAS can be connected via a router or network switch. The majority of the time, depending on the size of the network, CAT6 gigabit ethernet cables are used to route the storage devices to the network. In recent years, 802.11 has been implemented into many NAS devices. This allows for wireless communication with protocols such as G and N.

Supported NAS Protocols

NAS servers are capable of supporting many different transfer protocol types. Most commonly they support network file systems (NFS), common internet file systems (CIFS), and file transfer protocol (FTP). Depending on the operating system and control system you choose to use to access the files, your interface experience may vary.

Disc Types

Many different disc types are supported including SATA and standard ATA formats. Depending on the unit that you purchase, you may or may not be able to upgrade the drives within. NAS servers are often commercially sold to only support one standard, either SATA or ATA. If you build your own NAS server, you have the choice of using both.

NAS Pitfalls

Because NAS devices are independent from the server in your network cluster, they do run a bit more efficiently. They don’t have the server’s load as well as the storage load to take care of. Because store bought NAS devices are typically slower, putting a high stress load on them is difficult. Depending on the number of users in a network trying to access the files, the device may have a hard time keeping up. It is usually difficult to upgrade pre-built NAS servers. It is best to either purchase one you know will handle your needs or build your own that can handle the amount of server traffic you expect.

RAID

Setting up a RAID (redundant arrays of independent disks) on a NAS is a good idea. It allows you to backup your network users’ data without storing it on their PCs. This redundancy takes the burden of backup and storage off of the individual PCs.