Secure and reliable data storage is one of the highest priorities for businesses of all sizes and individuals. All digital information must be presented holistically and securely protected from tampering. It is also essential to make sure that all the data stored on the media is accessible to a user.
Data storage technology is a significant aspect of any business. Enterprises of all sizes have a lot of information that should be stored based on three main components: confidentiality, integrity, and availability.
Often, traditional data storage solutions do not provide the proper level of information security. Using external media with a direct connection to the device in the corporate segment is outdated. Storing data on the workplace computer is also not an option. Of course, it is an excellent method for storing personal data, but when talking about a company’s confidential files, we consider more protection.
There are several efficient storage systems that can be used in an enterprise. These options are NAS and SAN, which are designed for networked storage. They both have advantages and disadvantages, which can help businesses choose which data storage is more suitable.
What is NAS?
Network Attached Storage (NAS) is a file storage server. It has one or more slots for hard drives, which are combined into RAIDs. Most often, the hard drives work crosswise. That is, if one of them fails, no information is lost, and the data written after a failure will be stored on the other disks. This provides reliability and assurance that the user will not lose crucial documents due to a common malfunction.
What is a SAN?
Storage Area Network (SAN) is an architectural solution that connects different external storage facilities. A SAN consists of disk arrays and servers that are connected by network infrastructure elements - cables and switches and managed by a controller.
Using different types of virtualization, SAN presents storage devices to the host so that the storage is locally connected.
NAS vs. SAN - Main Differences
NAS is a specific device that is used to store data. NAS systems can be clustered together to increase the storage capacity, but each component will still remain as separate hardware. A SAN is a set of devices that together constitute a storage network.
So the main difference is clear from the names themselves: NAS is storage, and SAN is a network. Another distinguishing feature is that NAS is connected to the local network, which increases internal traffic. Due to bandwidth limitations, NAS is often used as additional storage when the existing network resources are no longer sufficient. On the other hand, a SAN is a separate network from the local one, which allows for a reduction of the load.
There are Several Main Differences between SAN and NAS:
Areas of Use. NAS is advantageous for corporate purposes, especially when it comes to small or medium-sized businesses. For companies, NAS devices with several hard drive slots are suitable, making it possible to store a large amount of data. A less extensive NAS will be more profitable for private entrepreneurs or freelancers and provide reliable data storage.
SAN systems are beneficial in large companies where networked storage capacity will not be enough. While NAS can be used for both domestic and corporate purposes, the scope of SAN is purely professional.
Limitations. NAS devices allow a user to store a limited number of files, depending on the amount of memory and available slots on the hard drives. Multiple devices can be clustered to increase capacity. SAN can store an unlimited amount of data because it is not a single piece of hardware but an architectural solution that allows connecting external storage devices.
Ease of Management. NAS is an easy storage device that can be configured without professional assistance. For this reason, they are often used for storing personal files. This is also a plus for small and medium-sized businesses. SANs are much more complex to manage. The network consists of several devices, so changing settings is more challenging than with NAS.
Performance. Multiple users can access a storage network or NAS. And this is where the first pitfall of NAS comes in. The more users connect to a NAS simultaneously, the poorer its performance becomes. When uploading small files, there will be no visible problems.
However, if there is a need to download a multi-gigabyte document, the speed will significantly decrease. This is especially dangerous when uploading critical files. Even a few-second delay can substantially slow a company down in some industries, so this problem must be eliminated.
The performance of SAN is always high, no matter how many people connect to them at the same time or what size files they start working with.
Cost. NAS will cost reasonably cheap – you need to buy and configure the hardware to operate swiftly. Using a SAN requires a more considerable financial investment. Given the complexity of changing configurations, you may need to hire an outside expert. The maintenance will incur even higher costs, so implementing storage networks for companies with small budgets may not be profitable.
How to Choose Between NAS and SAN?
For a company with several hundred employees, a storage area network will be a better option. The high cost of integrating a SAN into the business will pay off with high-speed file access.
However, if you are a freelancer, entrepreneur, small business owner, startup funder, or just want to find space for your personal data, it is beneficial to go with NAS. Networked storage offers convenient access to your files, and there is little cost to buy and set it up.
When choosing between NAS and SAN, estimating your resources, expectations, and requirements is essential. This way, you will make the best decision.