Comparison Between HDD Raid Or SSD Raid

In this article, you’ll learn a major difference between HDD Raid or SSD Raid. The PC storage system has always been the slowest component. Your CPU offers a fast cache memory, which interacts with RAM slowly, and then we have your systems disks, which are again very slow.

RAID stands for Redundant Array of Independent/Inexpensive Disks. Raid is used to combine various disks into one to improve reliability, performance, or both. With SSDs instantly taking over from mechanical hard drives, this presents us with an option: HDD Raid Vs SSD Raid.

An Overview Of RAID Levels


Well, there is no universal standard for RAID configurations, there are many RAID “levels”. When we compare both HDD RAID technology or SSD RAID technology, it’s necessary to check the pros, cons, and number of drives you want for every RAID setup.

  • RAID 0 wants two disks, provides no duplication but lots of speed and no disk space penalty
  • RAID 1 requires two disks, provides redundancy, but just small speed gains and a 50% penalty of disk space
  • R-10 wants four disks, offers duplication, provides fast reads, good write speeds, and sacrifices 50% of disk space.

HDD RAID Vs a Single SSD

Well, we all know that mechanical hard drives are very slow, so one efficient way to get better throughput is by marking two similar drives into the RAID 0 configuration. The data is “striped” on both drives and they also act as one hard drive. However, every drive offers a unique part of your data, you can always have both drives interacting with any operation.

When we talk about raw speed, a single SSD is the best choice as compared to a RAID 0 hard drive setup. Even the fastest, costly. So both of them in RAID0 would only manage a little under twice that.

Well, SATA III SSD also very close to the limit of the connection at 600MB/s. If we’re talking about NVME SSDs uses the PCIe protocol, then it’s read speeds exceed 2000MB/s.

Alternatively, if pure performance is what you’re searching for, a single SSD will always good and beat a pair of mechanical drives. Even if they are the quicker mechanical drives all over the globe.

If we talk about data protection or reliability then the same goes for it. If you have a setup of RAID 10 with a total of four hard drives, you can then get double the drive speed and you can also lose a drive without losing any important data. Rather than this, a single SSD still be a more efficient solution. SSD offers an infinite number of writes before they can no longer overwrite previous data, but you can still read whole data on the disk.


The SSD spontaneous failure is uncommon, but you always have a choice of executing two SSD in RAID 1. Well, the speed benefit is not significant, but one drive can fail fully without any data loss. We wouldn’t suggest you spend money on a RAID 1 SSD setup for data security. It’s very costly to just recover your hard drive image to an external drive.

HDD RAID VS SSD RAID: General Comparison

comparison between raids

Now that we are deal with the single SSD case. Now move further and talk about the direct RAID-to-RAID comparisons. So the mechanical drives in RAID as compared to SSDs in RAID. There are three major aspects to consider: price, performance, and data reliability. Let’s look at every possible aspect in more detail.


You are not surprised to hear that an SSD RAID configuration always beats any mechanical drive RAID setup from a performance perspective. The thing you should consider is how much performance you’ll gain after executing SSDs in RAID and whether it’s worth it. This is a difficult question.

One major factor is hardware vs software RAID. However, a dedicated hardware RAID controller will offer a good performance than a software-based solution. Also, when the speed increases, lots of components in your PC might become a limiting factor or “bottleneck”.

Well, there is a small difference between an M.2 NVMe PCIe drive or SATA III SSD. Rather than the latter being six or five times faster. Games don’t load very faster. Workloads like video editing or professional apps involving huge dataset analysis, alternatively, will consume too much bandwidth as you have to offer.


Although SSDs are expensive over the last few years, they are still too expensive on a per-gigabyte basis than mechanical drives.

This makes SSDs is not efficient in redundant mass storage. Mechanical drives in redundant or purely-redundant and performance RAID configurations quite relevant and they are cost-effective for desktop users. If you execute a home NAS system for file-sharing or streaming, it’s the best option for you.


A huge loss of data when an SSD can’t be written to is very unlikely. In different ways, RAID exists due to mechanical drives are liable to failure in the first place. In short, SSDs are very reliable that they don’t even make redundant or duplicate RAID compelling.


I hope this article makes you clear which one is suitable or meets your requirements. Let us know your thoughts about HDD RAID or SSD RAID in the comments section below!

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