QNAP NAS in business use: backup, virtualisation and storage solutions

For small and medium-sized businesses, a Network Attached Storage (NAS) has long been more than just a network drive in a server rack. When properly configured, a QNAP NAS fulfils three roles simultaneously: central file server, automated backup centre and platform for virtual machines and containers.

In practice, however, we regularly find that devices are incorrectly sized or purchased with unrealistic expectations. Snapshots are mistaken for backups, RAID is mistaken for data protection, and nobody checks the power consumption.

QTS vs. QuTS hero: The decision

Before we get into the hardware, it’s worth taking a look at the operating system, as this is where the most important architectural decision is made. QNAP offers two systems:

• QTS is the classic, widely used NAS operating system. It is based on an ext4 file system, is resource-efficient, runs on virtually every model and handles file serving, backup, surveillance and virtualisation with ease.
• QuTS hero utilises the 128-bit ZFS file system. The practical benefits include protection against silent data corruption, self-healing, inline deduplication and compression, as well as WORM (Write Once, Read Many) to prevent subsequent tampering. The trade-off is a significantly higher RAM requirement.

Our rule of thumb: when it comes to traditional file storage and backup on a moderate budget, QTS is the pragmatic choice. If data integrity, compliance or intensive virtualisation are the priority – and sufficient ECC RAM is available – QuTS hero really comes into its own. Important: switching between the two systems requires the data volumes to be wiped.

Pillar 1: Storage and File Servers

The core function remains centralised, secure file storage – as a network drive on Windows and macOS, with user and permissions management, integration with Active Directory, and fast network interfaces, which today start at 2.5GbE and go up to 25GbE.

Two terms are regularly confused here, with costly consequences:

• RAID is not a data backup. RAID protects against the failure of individual hard drives and keeps the system running – nothing more. A folder accidentally deleted, ransomware encryption or a controller fault is not covered by RAID; on the contrary: The damage is replicated across all drives.
• Snapshots are a recovery tool, but not a full-fledged backup. QNAP snapshots freeze the data state at block level with virtually no delay and allow you to roll back in seconds – ideal for protecting against accidental deletion and an effective first line of defence against encryption trojans. However, as they are stored on the same device, they are worthless in the event of total hardware failure or theft. They complement a backup; they do not replace it.

RAID overhead must also be factored into storage planning. Take a 12-bay system as an example: 12 hard drives at 8 TB each give a gross capacity of 96 TB. In a RAID 6 configuration (two parity drives, capable of withstanding the failure of up to two drives), ten of these drives are available as usable capacity – that is, around 80 TB gross, which amounts to approximately 72 TB in practice after formatting. Anyone planning based on gross figures from data sheets can easily miscalculate by a fifth (QNAP, RAID Types).

Pillar 2: Backup and ransomware protection – the 3-2-1 rule

The recognised minimum requirement is 3-2-1: three copies of your data, on two different media or systems, one of which is stored at a different location. On the NAS, this is implemented using Hybrid Backup Sync (HBS 3), which automatically writes versioned backups to a second NAS, external storage devices or the cloud.

The most common planning error is underestimating the capacity of the backup destination. A sample calculation:

• Initial situation: 8 TB of production data stored on the main NAS (RAID 6).
• Data growth: Assumed to be 20% per year. After three years, this amounts to 8 TB × 1.2³ ≈ 13.8 TB.
• Versioning: If multiple recovery points are retained, storage requirements increase. HBS 3 deduplicates and compresses data, so in practice the overhead is around a factor of 1.5 rather than 2: the backup destination should be able to hold ≈ 21 TB net in the medium term.
• Recommendation for backup NAS: Six 6 TB drives in a RAID 5 array provide 30 TB gross and around 24 TB net – this covers the requirement with a margin.

These 21 TB constitute the local backup (the second copy). You can create the third, external copy using a second NAS at a different location (via HBS 3 or Snapshot Replica, which only transfers changes), via rotating USB storage media, or via a cloud connection. Only then is the 3-2-1 rule fulfilled.

To protect against ransomware, QNAP offers two additional mechanisms: write-once, read-many (WORM) backups under QuTS hero, which cannot be overwritten or deleted within the retention period, and the air gap principle – the backup connection is only activated during the backup run and is otherwise disconnected, ensuring that malware cannot reach the backup medium.

Pillar 3: Virtualisation and Containers

Complete Windows or Linux machines run directly on the NAS via Virtualisation Station, whilst Container Station allows Docker and LXD microservices to be run. This means that a suitably sized NAS can replace a separate hypervisor host – for example, for a domain controller, a small database, a reverse proxy or test environments.

When it comes to real virtualisation workloads, the benefits of ZFS (Zettabyte File System) become particularly clear: if several VMs are created from the same template, QuTS hero’s inline deduplication significantly reduces storage requirements – QNAP cites a potential saving of up to 95% for 20 identical VMs. For I/O-intensive and latency-critical workloads (databases, VDI, many parallel VMs), it is not the gross capacity that is decisive, but the IOPS performance. This is where all-flash systems come into play; their advantage lies not in lower power consumption, but in massively higher random access rates with minimal latency.

A practical comparison of three QNAP models

To help you find your way around quickly, our QNAP NAS range is divided into two lines:

• QNAP Business storage for small and medium-sized enterprises – subdivided into tower hybrid HDD/SSD, rack-mount hybrid HDD/SSD and all-flash.
• QNAP Enterprise storage for business-critical environments – featuring hybrid HDD/SSD, all-flash and high-availability dual-controller systems.

The following selection covers three typical requirement categories across both ranges – from compact entry-level models to all-flash enterprise systems.

• TS-253E-8G – the compact entry-level model. Despite its two-bay design, this is a fully-fledged business device: the quad-core processor and 8 GB of RAM handle Docker containers, small VMs and monitoring tasks, whilst the two M.2 slots serve as NVMe cache. In practice, the device achieves around 280 MB/s via 2.5GbE and, without hard drives, consumes just around 12 W.

• TS-1264U-RP-8G – the flexible rack solution. Twelve bays, two redundant power supplies and a free PCIe slot for a future 10 or 25GbE upgrade make it the classic file and backup server for small and medium-sized businesses. It comes with QTS pre-installed, but can be upgraded to QuTS hero with ZFS and WORM if required. Actual transfer rates over 2.5GbE are around 295 MB/s, whilst port trunking enables speeds of up to 5 Gbit/s.

• TS-h1090FU-7232P-64G – All-flash storage for demanding workloads. Ten U.2 NVMe bays, an AMD EPYC processor, 64 GB of ECC RAM and two factory-fitted 25GbE ports are designed to handle virtualisation, databases and 4K/8K media workflows. The ZFS foundation provides self-healing, virtually unlimited snapshots and inline data reduction.

Electricity cost calculation: NAS versus traditional server

Continuous operation around the clock: For the following example calculation, we assume a commercial electricity rate of 0.27 €/kWh – which corresponds to the German average for commercial customers in 2026 – and 8,760 operating hours per year (Wattline, 2026).

The formula is simple:

>Annual consumption (kWh) = Power (W) ÷ 1,000 × 8,760 h
>Cost per year (€) = Annual consumption × 0.27 €

System (assuming continuous load)	Power	Annual consumption	Annual electricity costs
TS-253E (entry-level, 2 plates)	≈ 25 W	219 kWh	≈ 59 €
TS-1264U-RP (SME, 12 drives)	≈ 90 W	788 kWh	≈ 213 €
Traditional x86 tower server	≈ 150 W	1.314 kWh	≈ 355 €

The wattage figures are transparent estimates provided for illustrative purposes – your actual consumption depends on the configuration and load and can easily be measured using an energy meter. Bottom line remains: compared to a comparable conventional server, the SME NAS saves around €142 in electricity costs per year (≈ 525 kWh), amounting to approximately €710 over five years – and that’s before the savings from not having to pay for a Windows Server licence are even factored in. With all-flash systems, power consumption is higher due to the CPU and 25GbE network; their advantage lies not in power consumption, but in performance per watt under I/O load.

New or refurbished? A question of total cost

Not every business needs a brand-new device. A backup destination in the next room or a NAS at a secondary site doesn’t have to be the latest generation. In such cases, tested, refurbished hardware is often the more cost-effective choice whilst the production system is being replaced. In our shop, you can purchase QNAP systems both as new and as refurbished/second-hand. This allows you to implement a 3-2-1 strategy without having to buy each of the three systems at full price. If you wish to replace older equipment, you can also trade it in via our IT hardware buy-back scheme.

Conclusion

Three points are crucial: choose the right operating system (QTS or QuTS hero) before populating the device. Set up your backup strategy properly according to the 3-2-1 rule – snapshots and RAID are no substitute; and select hardware based on the actual workload rather than on gross figures. From the compact TS-253E to the 12-bay workhorse TS-1264U-RP and the all-flash system TS-h1090FU, a cost-effective solution can be built for every requirement category.

Are you unsure which model and backup configuration are best suited to your environment? We’d be happy to help you choose the right NAS system for your specific requirements. Simply get in touch via our contact form or send us a product enquiry directly via our enquiry form.

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