What is an HD and SSD SSD
a HD (Hard Drive Disk, in Portuguese) it is the hardware element that permanently stores the operating system and data on the computer. Unlike RAM, data stored on the hard drive does not disappear when the computer is turned off.
The HD uses a magnetic recording mechanism, through rigid plates, divided into several sectors and tracks that hold the bytes that make up the files. The magnetic plates rotate around an axis and, with a mechanical arm (head), travels the entire surface of the plates reading the data (files) that were requested by the operating system or by the user.
The quality and speed of recording thus depend on the thickness of the discs – the thinner, the more quality they have – and the speed of rotation – the higher the speed when spinning, the better read and write. Thus, as the mechanical arm must move to the requested position, this can take considerable time, which also depends on the amount of data stored.
As for the discs SSD (Solid-State Drive), they are faster and can double or triple the speed of reading and writing data. They resemble flash drives, USB, only packaged in standard disk drives. In other words, SSD units store data in microchips connected to each other, in the same way as pendrives, working with an integrated processor, for operations related to reading and writing data.
Differences between HD and SSD
These two types of disks have several differences between them, in addition to the higher read and write speed of the SSD, as mentioned above, this storage unit is faster and more resistant to physical impacts, but has more flaws than the HD. See below in detail the aspects that should be considered when comparing the two:
* Start-up time: solid disks take less than half the time to boot up than hard disks (7 seconds for the former and 16 on average for the latter).
- Data transfer: on average, between 200 and 550 MB per second in the case of SSDs, while, on HD, between 50 and 150 MB for the same time.
- Capacity: HD disks have greater storage capacity than SSDs. While the former can only be between 1 and 10 TB, the capacity of the latter ranges between 256 GB and 4 TB.
- Resource consumption: SDD generally consume less than HD.
- Scripture: SDDs only allow a limited number of recording in their cells, a situation that does not happen with HD.
- Noise and vibration: due to mechanical operation, HD generally makes more noise than SDD, which is quieter and does not vibrate like the first ones.
- Price: SSDs are much more expensive than HD.
Which disc to choose?
The choice depends mainly on the type of use to be made of the computer. If you want to store a large amount of content on your PC, such as movies and series or if you have a tight budget, the most appropriate option is to choose an HD disk.
If, on the contrary, you have no budget problems and you are mainly interested in speed, to play or because you use the computer for activities that require speed such as editing, graphic design or other similar activity, a SDD it would be the best choice.
Another solution is to have a PC with an SSD drive and an external hard drive to store heavy content. So, you would have a much more agile computer and space to store everything you need.
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