IDE
Laptop hard drives are very similar to desktop hard drives, indeed they work in exactly the same way and even use the same interfaces. However laptop hard drives are designed to be much smaller (2 inches as opposed to 3.5) and draw less power than desktop hard drives. As a result laptop hard drives are usually much slower in terms of data transfer and have much smaller storage capacity than a desktop hard drive of the same year manufacture. With an adapter it is possible to use a laptop hard drive in a desktop computer, and if mounted externally it is also possible to use a desktop hard drive on a laptop.
Three common standard interfaces CD-ROM drives use are IDE, SCSI, and USB. Newer interfaces may supplant these three for the lead.
There are many different interfaces used. For internal hard drives, older drives use/used PATA (Parallel ATA, originally just called ATA, and commonly referred to as IDE). Newer drives generally use SATA (Serial ATA). For external drives, connections include USB (1.0, 2.0, and 3.0), eSata, and Firewire (IEEE 1394).
Laptops use 2.5 inch hard drives, while desktops use 3.5 inch hard drives.
All PATA (Parallel ATA) drives use the Molex 4-pin power connector. This connector provides the necessary power to the drive, supplying +5V and +12V to operate. The Molex connector is typically used for older hard drives and optical drives before the transition to more modern interfaces like SATA.
SATA IDE cable do most hard drives use toda.
It can use either: real hard drives and virtual ones.
Computers use a variety of types of media, including hard disk drives, USB drives, CD-ROMS and DVDs. All are considered removable media except the hard disk drives, which typically are placed permanently inside the computer.
All computers use a hard drive to store programs and files.
There are three common standards CD drives use to interface with a system. They are known as USB, SCSI and IDE. With the modern technology, new interfaces will come into play.
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with external drives, they use USB interfaces. Basically this means, you can swap them from PC to PC, simply by plugging, and unplugging it. (once data has been saved to the drive, and you know it isn't spinning)