What is computer hard drive

              What is computer 
                    Hard drive 
  
The hard drive is what stores all your data. It houses the hard disk, where all your files and folders are physically located. A typical hard drive is only slightly larger than your hand, yet can hold over 100 GB of data. The data is stored on a stack of disks that are mounted inside a solid encasement. These disks spin extremely fast (typically at either 5400 or 7200 RPM) so that data can be accessed immediately from anywhere on the drive. The data is stored on the hard drive magnetically, so it stays on the drive even after the power supply is turned off.

How is a hard drive connected to a computer?

An internal hard drive is connected to the computer using a data cable (IDE, SATA, or SCSI) that connects to the motherboard and a power cable that connects to the power supply.

• Installing a PC IDE/EIDE hard drive.External hard drives come in many shapes and sizes. Some are large, about the size of a book, while others are about the size of a cell phone. External hard drives can be very useful since they usually offer more space than a jump drive and are still portable. The picture to the right is an example of a laptop hard disk drive enclosure from Adaptec. The user may install a laptop hard drive of any storage capacity into the enclosure and connect it via USB port to the computer.
  

  What are the sizes of hard drives?

  The hard drive is typically capable of storing more data than any other drive, but its size can vary depending on the type of drive and its age. Older hard drives had a storage size of several hundred megabytes (MB) to several gigabytes (GB). Newer hard drives have a storage size of several hundred gigabytes to several terabytes (TB). Each year, new and improved technology allows for increasing hard drive External hard drives come in many shapes and sizes. Some are large, about the size of a book, while others are about the size of a cell phone. External hard drives can be very useful since they usually offer more space than a jump drive and are still portable. The picture to the right is an example of a laptop hard disk drive enclosure from Adaptec. The user may install a laptop hard drive of any storage capacity into the enclosure and connect it via USB port to the computer..External hard drives come
  

  

  in many shapes and sizes. Some are large, about the size of a book, while others are about the size of a cell phone. External hard drives can be very useful since they usually offer more space than a jump drive and are still portable. The picture to the right is an example of a laptop hard disk drive enclosure from Adaptec. The user may install a laptop hard drive of any storage capacity into the enclosure and connect it via USB port to the computer.

  

  
  

  

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