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You are watching: What two types of technologies are used inside hard drives


What space the Main types of computer system Hard decaying Drives?

Computers rely on difficult disk drives (HDDs) to save data permanently. They room storage devices used come save and retrieve digital info that will be forced for future reference.

Hard drives space non-volatile, meaning that they retain data also when they execute not have power. The information stored stays safe and intact uneven the difficult drive is ruined or interfered with.

The details is save on computer or re-cover in a random-access manner as opposed to sequential access. This implies that blocks of data can be accessed at any type of time they are compelled without walking through other data blocks.


Currently, us can group hard drives into 5 types:

Parallel Advanced modern technology Attachment (PATA)Serial ATA (SATA)Small computer System interface (SCSI)Solid State cd driver (SSD)NVM Express

IBM 350 RAMAC, volume 5MB


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The IBM 350 Disk paper was emerged under the code-name RAMAC by an IBM san Jose team led through Reynold Johnson

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Hard disc Drives have Stood the test of Time

Hard disk cd driver were presented in 1956 by IBM. In ~ the time, they to be being provided with general-purpose mainframes and also minicomputers.

Like other electronic devices, these have witnessed numerous technological advancements over the years. This is in regards to capacity, size, shape, inner structure, performance, interface, and modes of save data.


These numerous changes have do HDDs stand the test of time. Not favor other gadgets that came to be obsolete the moment they were introduced in the market. A floppy decaying is a good example.

Hard Drive types at a Glance

Currently, we can team hard drives into four types:

Parallel Advanced technology Attachment (PATA)Serial ATA (SATA)Small computer system System interface (SCSI)Solid State drives (SSD)NVM Express

Parallel Advanced technology Attachment

These to be the first types of hard disk drives to it is in developed. They made use of the Parallel ATA user interface standard to attach to computers.

These types of drives room the people we describe as combined Drive electronics (IDE) and magnified Integrated Drive electronics (EIDE) drives.

These PATA drives were introduced by western Digital and Compaq earlier in 1986. They listed a common drive interface technology for connecting difficult drives and also other tools to computers.

Data move rate can go up to 133MB/s and a best of 2 gadgets can be connected to a journey channel. Many of the motherboards have a supplication of 2 channels, therefore a total of 4 EIDE gadgets can be linked internally.

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They exploit a 40 or 80 wire ribbon cable transporting multiple bits of data all at once in parallel. This drives save data through the use of magnetism.