HardDisk drivecan be classified to mechanical hard disk drive (HDD) and solid state drive (SSD).
Traditional mechanical hard disk is also known as ordinary hard disk.
Headcan move along the disk radius.
And the disk can do thousands of high speed rotations in per minute.
Information can be read by the opposite way.
Dust is the enemy of hard disk (as precision equipment).
So the air which enters into the hard disk must be filtered.
There is a head on each disk storage surface.
The distance between head and the disk is smaller than the diameter of a human hair.
Distinguish
The advantages and disadvantages between HDD and SSD:
1.
Shock resistance: HDD is disk pop in, and the data is stored in the disk sectors.
As the SSD is made from flash particles (orstorage mediumlike memory, MP3,U disk, etc.
), there are no mechanical components in SSD.
And it can minimize the possibility of data loss when collisions and shocks.
Compared with HDD, SSD has many advantages.
Besides, an HDD is also slower than an SSD during normal use.
Consumption: consumption of SSD is lower than that of mechanical hard disk.
Weight: solid-state hard drive is lighter than the HDD.
Mechanical hard disk is inferior to it.
Price: An SSD is more expensive than an HDD.
Capacity: the biggest capacity of solid-state drives is 4T (3.5 inches).
The service life: SLC can read and write for 100,000 times.
And the low cost MLC can read and write for only 10000 times.
So compared with solid-state drives, mechanical hard disk has a longer service time.
By contrast, to make it get fast read-write speed, many computer users choose SSD.
Generally, to migrate OS from HDD to SSD is the common thing.
