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Seagate Archive HDD v2 ST8000AS0002 8TB 5900 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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- Hard Drive FAQ
Internal Hard Drives
Internal hard drives are core components to any PC. They are also known as “mechanical hard drives” due to the mechanical system inside each drive. The internal setup of a hard drive is composed of an actuator arm and a read/write head, a stack of several spinning platters, and a spindle. The platters spin, allowing the read/write head to move to different parts of the platters to either read/write data using electromagnetism to either change polarity in sections of the platter when writing or to sense polarity when reading.
The primary use of an internal hard drive is to permanently store data. This does not mean that the data cannot be deleted; instead, it means that unlike RAM, which acts as temporary storage, an internal hard drive hold data permanently without requiring constant power. These hard drives are also mounted on the inside of a computer system and are necessary for the installation of an operating system for a computer. Internal hard drives are also known as hard disk drives (HDD). SSDs or solid state drives are often conflated with hard disk drives, but this is incorrect. SSDs serve a similar purpose but are not the same as an HDD.
With a couple of exceptions, Internal hard drives typically measure 3.5” or 2.5” wide, which make them perfectly sized for desktop and laptop installations respectively. Some desktop PC builders will still use 2.5” hard drives for space and aesthetic reasons. While internal hard drives are usually installed inside a computer case, they can also be mounted in an external hard drive enclosure to make the hard drive a portable storage device. For the budget conscious, Internal hard drives offer the most data storage capacity for the lowest spend of all the storage options, easily providing value with TB drives.
To connect to a motherboard, internal hard drives use a number of formats, including SCSI, ATA or SATA ports. Internal hard drives require external power to operate, but will maintain the stored date even after the power is turned off.
