Types and differences of hard disks

Hard disks are divided into solid-state hard disks and mechanical hard disks.

The differences are as follows:

1, with different working principles:

Solid state hard disk uses semiconductor state as storage medium, and mechanical hard disk uses magnetism as storage medium.

2, reading and writing speed is very different:

Because SSD is a semiconductor storage medium, its reading and writing speed is much faster than that of mechanical hard disk.

3, the security level is very different:

Solid-state hard disk uses semiconductor as storage medium, so it is more earthquake-resistant, fall-resistant and more complete than mechanical hard disk.

Extended data:

Characteristics and applicability of green disk, blue disk, black disk and red disk in hard disk;

1, black disk: high performance, large cache and fast speed. Code name: LS WD Caviar Black is mainly suitable for enterprises, high-throughput servers and high-performance computing applications, such as multimedia video and photo editing and high-performance game machines.

2, green disk: SATA hard disk, lower calorific value, quieter and more environmentally friendly. Energy-saving disk, suitable for mass storage; Adopt IntelliPower technology and rotate at 5400 rpm. Advantages are quiet and low price; Disadvantages are poor performance, high delay and short life.

3, blue disk: ordinary hard disk, suitable for home use. Advantages are strong performance, low price and high cost performance; The disadvantage is that the sound is slightly louder than the green disk and the performance is slightly worse than the black disk.

4. Red Disk: Western Digital launched a new hard disk for the NAS market, aimed at NAS users in families or small businesses with 1 to 5 hard disks. Performance characteristics close to the green disk, low power consumption, low noise, can adapt to long-term continuous work. It has the characteristic technology NASware, which makes it more compatible, and it can have excellent compatibility with both NAS and RAID.

Baidu Encyclopedia-Hard Disk Type