BackBlaze, a cloud-based backup service, claims that SSDs fail at nearly the same rate as hard drives at an equivalent stage in their lifecycle. This conclusion was made on the basis of three years of observations of the operation of SSD in the company’s systems.
The BackBlaze blog has appeared recording, which describes how the company first used disk drives in its systems, and then began to use SSDs instead. The company closely monitors the health of its systems, so it can compare the failure rates of SSDs and HDDs. To make the comparison fair, BackBlaze compared the failure rates of SSDs and hard drives used as boot drives at a similar age and found broadly similar failure rates.
As a result of research, BackBlaze stated that it is questionable to use failure rate as a factor in the decision when deciding between HDD and SSD. After the company checked the age and usage time of the drives, they found that the difference was not enough to justify the additional cost of purchasing an SSD instead of an HDD. At the same time, BackBlaze advises you to make a decision about choosing a type of drive based on cost, speed, power consumption and size.
In the first four years of using BackBlaze, SSDs failed slightly more often than hard drives, with an annual failure rate of 1.05%, up from 1.38%.
The graphs showing the frequency of failure of drives look very similar, but in order to see the full picture, it is necessary to observe the state of drives for several more years.