NVMe, SSD, or HDD—Which Drive to Choose for a VPS

When choosing a VPS, people often overlook the drive type and only remember it when the server starts to slow down due to data operations.

The storage device is responsible not only for storing files but also for holding the OS, applications, databases, logs, temporary files, virtual disks, and more. Therefore, the drive’s speed directly affects how quickly servers respond to requests.

The choice of storage typically comes down to three options: HDD, SSD, and NVMe. We recommend choosing a storage type based not on potential speed, but on the nature of the server’s workload. And in this article, that’s exactly what we’ll explore.

Differences Between HDD, SSD, and NVMe

An HDD is a classic hard disk drive that operates on a mechanical principle. They are usually inexpensive, which makes them attractive. However, one drawback is the high latency in accessing data, which is a consequence of their mechanical design.

SSDs use flash memory and have no moving parts, so they operate much faster than HDDs. This type of drive handles a large number of small operations well, and for most VPS instances, an SSD offers a reasonable balance between cost and performance.

NVMe is a storage interface protocol that typically runs over PCIe. It is specifically designed for high-performance flash memory and supports a large number of concurrent tasks. As a result, NVMe SSDs offer higher throughput and lower latency compared to traditional SATA SSDs. By the way, it’s more accurate to say “SATA SSD vs. NVMe SSD” rather than “SSD vs. NVMe.

HDDs, when performance isn’t the main priority

You can safely choose an HDD when the server is used primarily as storage for: file archives, backups, a statistics website, or a test server with a light load.

The main advantage of an HDD is the ability to obtain a large storage capacity at a relatively low cost.

However, for applications that constantly require disk I/O, an HDD may not be the best choice. Running databases, virtual machines, or directories with a large number of files is a weak point for this type of storage. This is worth considering when making a choice.

An SSD is the optimal choice for most servers

An SSD is the most common choice for VPS. They are significantly faster than HDDs and are sufficient to handle the vast majority of tasks, such as hosting websites and web applications, small databases, enterprise services, test and production environments, etc.

For servers, latency is of great importance—that is, “how quickly the drive can process many small requests.” At the same time, SSDs themselves vary greatly depending on the type of flash memory, controller, write endurance, and the presence of power-loss protection. For example, an SSD designed for intensive writing will be better suited for a database or continuous log writing than a standard consumer drive.

NVMe: When Maximum Speed Is Needed

It makes sense to use NVMe drives where the disk subsystem is a bottleneck for performance. This protocol can provide lower latency and higher throughput. In virtual server tests from the RUVDS report, NVMe demonstrated a clear advantage in read and write speeds over SSDs and HDDs when the VPS configurations were identical.

NVMe is well-suited for high-load databases, systems with a large number of I/O operations, caching, virtualization, big data processing, resource-intensive applications, and so on.

However, it’s important to understand that NVMe won’t automatically speed up a VPS. If an application is bottlenecked by the CPU or the amount of RAM, switching to a faster drive may make virtually no difference.

Why Drive Speed Isn’t the Only Criterion

In addition to drive speed, there are other parameters that affect its performance.

For example, IOPS and latency. Two drives with similar read speeds can behave completely differently under real-world workloads.

Write endurance is also an important parameter for databases, logs, or monitoring systems. Parameters such as TBW and DWPD (which determine the amount of data that can be written before memory cells wear out), as well as PLP (protection against data loss during a sudden power outage), vary and are of great importance for certain workflows.

Often, with VPS, specifications are outlined in advance by the hosting provider; however, details such as the storage class, endurance, or disk subsystem performance are usually not mentioned. We recommend clarifying these points so you understand what type of storage you’re dealing with.

Final Thoughts

Of all storage types, NVMe SSDs are considered the fastest, but that doesn’t mean they’re the best fit for every situation.

HDDs are better, cheaper, and more efficient than NVMe drives if you need a large amount of storage space or for other tasks. SATA SSDs are better and cheaper than NVMe SSDs for tasks that do not require blazing-fast access speeds and performance.

NVM-based SSDs are necessary when a server, under current workload, cannot handle requests and experiences significant delays. For example, a resource-intensive application will likely require an NVMe drive.

The key is to choose a drive not based on the technology’s name, but based on its intended future use.