Over a longer time, and with larger files stored on an HDD, there is a high chance of fragmentation.įragmentation doesn’t occur on an SSD drive. SSD supports more I/O operations per second(IOPS). HDD supports fewer I/O operations per second (IOPS). Here are the differences between SSD and HDD Hard Disk Drive A typical 7200 RPM HDD can deliver read/write speed of 80 to 160 MB/s while a typical SSD can deliver read/write speed of 200 to 550 MB/s which makes it an ideal choice for better performance. In terms of speed, SSDs are much faster than HDDs because SSDs does not have electrical circuitry and moving parts as HDD. Moreover, groups of pages are organized into blocks. That is because SSD storage is made up of individual NAND cells, which helps you to store one bit of data, and groups of cells are organized into pages. SSD read and write speeds are uneven, so data reads are very fast, but SSD write speeds are quite slower. With SSD, there is no variable seek time or rotational latency because all the parts of the SSD can be accessed in the same amount of time. Data is written to or read from the NAND by a controller, which is consider the brains of the device. It uses a solid state medium, typically NAND (often known as flash). SSD drive works completely different than a HDD. To read or write data at a certain sector of a platter, the head requires to move to the appropriate position and then need to wait for the sector to pass underneath it when the platter rotates. It provides better performance compared to HDD. However, this data is stored on interconnected flash memory chips instead of platters, which makes them faster than HDDs. Solid State Drive ( SSD) is a non-volatile storage device that stores and retrieves data constantly on solid-state flash memory. In this SSD vs HDD article, you will learn: HDD also consists of an I/O controller and firmware, which tells the hardware what to do and communicates with the remaining system.

The faster the platter spins, the quicker an HDD can perform. It has a read/write head that floats above the spinning platter for Reading and Writing of the data. We will start with HDD: What is a Hard Disk Drive?Īn HDD uses magnetism, which allows you to store data on a rotating platter. But before jumping into the differences, let’s first understand “What is HDD?” and “What is SSD?”. In this article of SSD vs HDD differences, we will learn the key SSD and HDD difference.

Difference between ssd and sshd