Computer Concepts Computer Concepts --Illustrated Illustrated Introductory, Seventh EditionIntroductory, Seventh EditionUNIT B:Computer HardwareObjectivesObjectivesStorage technologyExpand your computerComputer Concepts – Illustrated Introductory, Seventh EditionIntroducing Storage TechnologyIntroducing Storage TechnologyStorage device¾ Equipment that stores and retrieves data from storage medium¾ Hard drives, card readers, tape drives, CD and DVD drives, flash drives, solid-state drives, Zip drivesComputer Concepts – Illustrated Introductory, Seventh EditionIntroducing Storage TechnologyIntroducing Storage TechnologyRAM (random access memory)¾ Temporary holding area for your work and programs needed to produce your work¾ RAM - emptied when computer shuts off¾ Data easily lost• Store data on storage medium, not as likely to lose workComputer Concepts – Illustrated Introductory, Seventh EditionComparing Storage TechnologiesComparing Storage TechnologiesRandom vs. sequential access¾ Random (direct) access• Ability to jump directly to requested data• Hard drive, solid-state drive, CD and DVD drives¾ Sequential access• Must read through data from beginning to end• Tape drive•Slower Computer Concepts – Illustrated Introductory, Seventh EditionComparing Storage TechnologiesComparing Storage TechnologiesAccess time¾ Average time it takes computer to locate and read data (milliseconds)Data transfer rate¾ Amount of data that can be moved from storage medium to computer per secondStorage capacity¾ Maximum amount of data store Measured in kilobytes (KB), megabytes (MB), gigabytes (GB), or terabytes (TB)Computer Concepts – Illustrated Introductory, Seventh EditionComparing Storage TechnologiesComparing Storage TechnologiesThree Types of Storage ¾ Magnetic storage: hard drive• Flexibility for editing data and reusing• No very durable, always keep a backup¾ Optical storage: CD, DVD• Portable, quite versatile¾ Solid-state storage: mp3 player, digital camera• Very durable, portable, versatile• Capacity does not currently match that of hard drivesExploring Hard Drive TechnologyExploring Hard Drive TechnologyHow does a hard drive work?Examining CDs and DVDsExamining CDs and DVDsThree optical digital technologies¾ Read-only (ROM)¾ Recordable¾ RewritableComputer Concepts – Illustrated Introductory, Seventh EditionCD-ROM (Read-only)CD-R (Recordable)CD-RW (Rewritable)DVD-R/ DVD+R(Recordable DVD)DVD-RW/DVD+RW(Rewritable DVD)Reviewing SolidReviewing Solid--State StorageState StorageSeveral types of solid-state memory cards¾ CompactFlash cards (CF)¾ MultiMedia cards (MMC)¾ SecureDigital cards (SD)¾ SmartMedia cardsComputer Concepts – Illustrated Introductory, Seventh EditionReviewing SolidReviewing Solid--State StorageState StorageUSB flash drive¾ Portable storage device with built-in connector that plugs into USB port¾ Small and durable¾ Can be carried on key ringComputer Concepts – Illustrated Introductory, Seventh EditionExpanding Your ComputerExpanding Your ComputerExpanding¾ Increase / improve capabilities of computer¾ Add peripherals• Scanners, mouse, cameras, graphics tablets, etc.¾ Add or upgrade sound cards, video cards, etc.Computer Concepts – Illustrated Introductory, Seventh EditionExpanding Your ComputerExpanding Your ComputerInstalling an expansion cardComputer Concepts – Illustrated Introductory, Seventh EditionExpanding Your ComputerExpanding Your ComputerDevice driver¾ Software that sets up communication between computer and device or card¾ Each device or card needs one¾ Directions supplied with device or card includes instructions for installing device driverComputer Concepts – Illustrated Introductory, Seventh EditionExercisesExercisesWhich of the following computers would you choose and why?• HP Mini 1000 Atom UMPC Laptop• Apple MacBook Air• Dell Inspiron 530• CyberpowerPC Gamer Infinity 3310 Core 2