How Much Storage Does Your Business Need? A Guide to Choosing the Right NAS Size

Well, that is a crucial question for every business that is going for a NAS. Choosing the right storage size is just like predicting the future. However, considering several things can help you decide a size that covers your current needs and also allows you to scale your business. We are here to help you decide the actual NAS size your business would need: 

1. Evaluate the amount of data you are using now:

Start by finding out the amount of data you generate and store at the moment. This includes: 

Existing File Servers/Local Storage: How much space are you currently using on your existing servers, desktops, and laptops that will be migrated to the NAS? Don’t just look at the total used space; also consider the rate at which this data is growing. 

Types of Data: There are various types of data, and each one takes up different amounts of storage. Consider the proportion of: 

• Documents and Spreadsheets: Relatively small files. 

• Presentations and PDFs: Average file sizes. 

• Images and Graphics: Can be very large. 

• Videos and Multimedia: Tend to be the largest files. 

• Databases: Can grow significantly over time. 

• Backups: The size of your backups will vary based on your backup strategy (full vs. incremental, retention policies). 

• Number of Users: The More users, the more likely data generation and storage on the NAS. 

This is what can be done: 

Inventory: Use the built-in tools in the operating system (for instance, Disk Management on Windows, Disk Utility on macOS, and the du -sh command on Linux) to check the space you have already used on the relevant drives and servers.  

Talk to Departments: Have conversations with the various departments of your business to find out their current storage usage and their projections for it into the future. The marketing department would probably have large image and video libraries, while the finance department would likely have many big databases. 

2. Predict Future Data Growth:

Simply meeting the current needs will not serve the purpose. Data growth must be anticipated over the entire life cycle of the NAS (typically 3-5 years), considering factors as follows: 

Business Growth: Are you going to employ more team members? Expand product lines or services? Potential data generation increase follows the growth of the business. 

New Projects and Initiatives: Are there any upcoming projects that will involve creating or storing significant amounts of new data (e.g., video surveillance, marketing campaigns, research and development)? 

Policies regarding Data Retention: For how long do you need to keep data by law or according to a deliberate strategy? If your retention period is longer, you’ll need more storage. 

Increased Digitization: Are you going to put more paper processes in a digital form, thus leading to an increase in digital documents? 

Backup Strategy: Are you going to have deeper or more frequent backups that will require more storage space? 

Rule of Thumb: Commonly calculate a twofold requirement for current storage, as a starting point for future storage within the next 3-5 years. However, this is a general guideline and may have to be adjusted as per individual requirements. 

3. Factor in Redundancy (RAID):

RAID or Redundant Array of Independent Disks is the foundation for data protection in which your data is allocated across different hard disks with a fault-tolerant provision of access to your data if any one of the drives fails. However, RAID uses extra storage space. 

RAID 1 (Mirroring): Duplicates all data across two drives. You get only half of the total storage capacity. (Two 4TB drives give you 4TB of usable storage). 

RAID 5 (Striping with Parity): Distributes data and parity information across at least three drives. Parity uses storage equal to a drive’s capacity. (For example, three 4TB drives give you approximately 8TB of usable storage).  

RAID 6 (Striping with Double Parity): This works similarly to RAID 5, but with double parity for increased fault tolerance. It uses the capacity of 2 drives for parity. (e.g., four 4TB drives give you approximately 8TB of usable storage). 

RAID 10 (Striping and Mirroring): A combination of RAID 1 and RAID 0 (striping for performance and mirroring for redundancy), needs a minimum of four drives, and you have half of the total amount of space. 

Key Consideration:  

You must remember that RAID uses up some of your Total storage. Therefore, plan for it while you also figure out the amount of space you need. For example, if you need 8TB of useful storage and plan to use RAID 5, you will need at least 3 drives with a combined raw capacity greater than 8TB (example: three 4TB drives = 12TB raw, ~8TB usable). 

4. Assessment of Overhead and Future Flexibility:

Operating System and Applications: The NAS operating system and any installed applications will indeed take up storage capacity. While it may not be as huge as your data, it is something you need to consider. 

Snapshots: Some modern NAS systems let you take snapshots, which are like saving a copy of your data at a specific time, so you can easily get it back if needed. 

 Buffer Space: As a general guideline, you should always leave some buffer space (for example, 10-20%) on your NAS for optimal performance and to stop the NAS from running out of space. A NAS that is full will degrade your performance. 

5. Determining Drive Numbers and Sizes:

Once you estimate your storage requirements (including redundancy and future growth), you will determine your NAS’s number and the size of drives. 

Number of Bays: Different NASs have different numbers of drive bays (for example, a 2-bay, 4-bay, 8-bay, etc.). More bays provide greater flexibility for RAID configurations and future expansion. 

Drive Capacity: HDDs and SSDs come in different capacities. SSDs are significantly faster, but they are still expensive per gigabyte. A hybrid solution with HDD for bulk storage and SSDs for caching frequently accessed files could be a great option. 

In conclusion, these are the key takeaways for choosing NAS size:  

Be Thorough: Do not underestimate both your present usage and future storage needs.  

RAID Tip: Always understand that each RAID level has some extra work or storage use; therefore, know what you’re getting into when you choose one. 

Know Your Performance Needs: Consider SSD caching or an all-SSD NAS if you’re looking for high performance.  

Plan Ahead: Choose a NAS that has enough slots for extra drives, in case you need more storage later. 

Don’t go overboard: While some extra room for growth is good, putting tons of storage into an environment where you’ll actually need a small fraction of it in 3-5 years might be costing a lot of money. You can always upgrade it later. 

Thoughtfully weighing all of these considerations and thoroughly assessing your business’s data requirements should leave you with the confidence to select a correctly sized NAS that can sustain your operations!