SSD vs HDD. Which one is Better?
Is your hard drive filling up and slowing down? If you’re ready for a hardware upgrade, you’ll need to choose between a traditional hard disk drive or a fast SSD. We’ll break down the differences between HDDs and SSDs.
What Is an HDD?
An enclosure contains a series of platters covered by a ferromagnetic coating. The direction of the magnetization represents the individual bits. Data is read and written by a head that moves extremely fast from one area of the disk to another. Since all of these pieces are “mechanical,” the HDD is the slowest component of any computer – and the most fragile.
What is an SSD?
These newer types of disks store information on flash memory, which consists of individual memory cells storing bits that are instantly accessible by the controller.
SSDs are more expensive than HDDs per amount of storage (in gigabytes (GB) and terabytes (TB)), but the gap is closing as SSD prices decline at a faster pace than HDD prices year over year.
SSD vs HDD
The main difference between an SSD vs a hard drive is the method of storage and access. A hard disk drive (HDD) is a traditional storage device that uses mechanical platters and a moving read/write head to access data. A solid-state drive (SSD) is a newer, faster type of device that stores data on instantly-accessible memory chips.
|Short Table Camparing the HDD and SSD|
|Full-Form||Hard Disk Drive||Solid State Drive|
|Speed Diff.||HDD has higher latency, longer read/write times, and supports fewer IOPs (input-output operations per second) compared to SSD.||SSD has lower latency, faster read/writes, and supports more IOPs (input-output operations per second) compared to HDD.|
|Heat, Electricity, Noise||Hard disk drives use more electricity to rotate the platters, generating heat and noise.||Since no such rotation is needed in solid-state drives, they use less power and do not generate heat or noise.|
|Defragmentation||The performance of HDD drives worsens due to fragmentation; therefore, they need to be periodically defragmented.||SSD drive performance is not impacted by fragmentation. So defragmentation is not necessary.|
|Components||HDD contains moving parts – a motor-driven spindle that holds one or more flat circular disks (called platters) coated with a thin layer of magnetic material. read-and-write heads are positioned on top of the disks; all this is encased in a metal case||SSD has no moving parts; it is essentially a memory chip. It is interconnected, integrated circuits (ICs) with an interface connector. There are three basic components – controller, cache, and capacitor.|
|Weight||HDDs are heavier than SSD drives.||SSD drives are lighter than HDD drives because they do not have rotating disks, spindles, and motors.|
|Dealing with vibration||The moving parts of HDDs make them susceptible to crashes and damage due to vibration.||SSD drives can withstand vibration up to 2000Hz, which is much more than HDD.|