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Learn about the evolution, components, and role of HDDs in PC systems, along with popular brands, trends, and performance indicators. Explore HDD interfaces, capacities, speeds, and more.

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  1. If your click on the slide cannot work, please scroll the bar on the right!

  2. By Hui Bian Department of Health Science Education University of Florida

  3. Introduction of Internal HDD for the Desktop In1950s,the first hard disk driveshowed up,20 inchesin diameter, store only5MBof data Oops! 5MB? Hard Disk Dirve By Hui Bian

  4. Example of HDD History Hard Disk Dirve By Hui Bian

  5. Continue • Primary communication device • Main location of all data stored in PC • Considered asPermanent storage compared with RAM • Able to access data quickly • Not removable from drive Hard Disk Dirve By Hui Bian

  6. Physical Components • Disk Platters • Spindle and Spindle motor • Read/write heads • Air filter • Logic board • Connectors and Jumpers Hard Disk Dirve By Hui Bian

  7. Hard Disk Dirve By Hui Bian

  8. Significant Role of HDD in PC system • When processing large amount of data such as: graphics work, editing sound and video, or working with database • Bigger HDD lets you store more programs • Provide support to software • High reliability Hard Disk Dirve By Hui Bian

  9. These features are also Performance Indicators of HDD Example of HDD Features • Western Digital Corporation—Model: WD800JB • Interface:IDE (Ultra ATA/100) • Seek time:8.9ms • Capacity:80GB • Rotational Speed:7200rpm • Transfer rate:100MBytes/sec • Buffer Size:8MB • Height:1.028 in • Width:5.787 in • Depth:4 in • Weight:1.32 Lbs Hard Disk Dirve By Hui Bian

  10. Interpretation of these features • Interface: mechanism of data transmission between the HDD and other devices (IDE or EIDE and SCSI) • Seek time:how fast drives can find a particular piece of data • Capacity: how much of data it can actually store Hard Disk Dirve By Hui Bian

  11. Continue • Rotational Speed: the speed of drive reading and writing data • Buffer Size: the space used storing all the information in case it’s needed • Normally 3.5” in diameter Hard Disk Dirve By Hui Bian

  12. Popular Brands and Models • Maxtor: DiamondMax D540X • Western Digital: WD800JB • IBM: Deskstar 120GXP • Seagate: Barracuda ATA IV • Quantum • Toshiba • Fujitsu • Iomega Not popular in over 60GB HDD Hard Disk Dirve By Hui Bian

  13. Hard Disk Dirve By Hui Bian

  14. HDD Trends • Areal Density: increase • Capacity: increase in an accelerating rate • Rotational Speed: faster and faster • Form Factor: smaller and smaller • Reliability: changing slowly Hard Disk Dirve By Hui Bian

  15. Continue • RAID:use of multiple disk array becoming increasingly common • Interface:IDE/ATA and SCSI still the mainstream • Performance:seek time and latency the area of greatest value to engineers Hard Disk Dirve By Hui Bian

  16. Reference • http://www.pcworld.com/ • http://www.harddrive.com/ • http://www.lycos.com/ • http://www.wdc.com/ • http://www.tli.unt.edu/library/hwswbasic/download.html • http://www.basichardware.com/ • http://service.gateway.com/gateway/ • http://www.seagate.com/ Hard Disk Dirve By Hui Bian

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