In storage, the future belongs to SSD as prices drop and capacity increases. New generation SSD designed for data centers have a reliability level comparable to that of mechanical HDDs, and their performance is 500 times higher. *
Compared to write / read data per second (IOPS) at HDD storage: up to 100 IOPS. On a DC S3K SSD: up to 75,000 read IOPS. 
A solid-state drive can perform 75,000 IOPS (I/O operations per second), while a hard drive can only perform 150.
While the write speed on conventional hard drives is 115 Mbit / s, for solid-state drives it can reach 430 Mbit / s.
Not only have SSD reduced the access time, the waiting time also remains stable, regardless of the load on the SSD. This guarantee of performance is the main advantage of solid-state data center drives.
MTBF 2 million hours of protection against memory corruption. Power Loss Immediate technology (protection against power interruption). Low power consumption.
In addition to maximum performance, its stability is of great importance for servers. This is one of the characteristics that distinguish mass-consumption SSD drives from the models for information centers used, in particular, by the BitWeb provider. When used as a RAID, a proportional increase in performance is guaranteed.
SSD drives are physically as reliable as high-quality mechanical drives.They have an average time-to-failure (MTBF) of 2 million hours. The greatest number of questions traditionally arise about the service life of SSD drives, since their memory cells can withstand a limited amount of overwriting. But there is no reason to panic! After each rewrite, the SSD controllers check the integrity of the data, and if the integrity is violated, the data is rewritten, and access to the failed cell is closed. As a result of applying this principle, the available storage capacity may decrease and performance may deteriorate, but disks in the data center have backup cells that provide a longer service life compared to mass-used drives.
Even if the cost of one GB in SSD drives continues to decline, mechanical drives still remain cheaper. In order to use the best characteristics of both types of drives, the BitWeb provider offers hybrid servers: 2 SSD drives for better performance (databases, frequently used information, etc.) and 2 HDD drives for convenient storage of information (backups, protocols, etc.).
While traditional hard drives consist of magnetic tapes and are controlled by a mechanical lever, solid-state drives (Solid-State Drive-SSD) consist exclusively of semiconductors (flash memory), which allows you to increase their speed and significantly reduce access time.