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computer hardware

computer hardware . f1031 – computer hardware. hard drive. The hard disk drive (HDD) is a magnetic storage device installed inside the computer. The storage capacity is measured in gigabytes (GB).

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computer hardware

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  1. computer hardware f1031 – computer hardware

  2. hard drive • The hard disk drive (HDD) is a magnetic storage device installed inside the computer. • The storage capacity is measured in gigabytes (GB). • Hard disks were invented in the 1950s. They started as large disks up to 20 inches in diameter holding just a few megabytes.

  3. continue • There are two ways to measure the performance of a hard disk: • Data rate - The data rate is the number of bytes per second that the drive can deliver to the CPU. Rates between 5 and 40 megabytes per second are common. • Seek time - The seek time is the amount of time between when the CPU requests a file and when the first byte of the file is sent to the CPU. Times between 10 and 20 milliseconds are common. • The other important parameter is the capacity of the drive, which is the number of bytes it can hold.

  4. track sylinder sector

  5. Types of bus adapter • Integrated Drive Electronics (IDE) was later renamed to ATA, and then later, PATA ("parallel ATA“) • SCSI (Small Computer System Interface) • SATA (Serial ATA) • SAS (Serial Attached SCSI)

  6. Upgrading a PC

  7. Select a Case and Power Supply • Determine the customer's needs before making any purchases or performing upgrades. • The computer case holds the power supply, motherboard, memory, and other components. • When purchasing a new computer case and power supply separately, ensure that all of the components will fit into the new case and that the power supply is powerful enough to operate all of the components.

  8. Select a Motherboard • When you select a replacement motherboard, make sure it supports the CPU, RAM, video adapter, and other adapter cards. • The socket and chip set on the motherboard must be compatible with the CPU. • The motherboard must accommodate the existing heat sink/fan assembly. • The existing power supply must have connections that fit the new motherboard. • The number and type of expansion slots must match the existing adapter cards. • The new motherboard must physically fit into the current computer case.

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