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

Introduction of Internal HDD for the Desktop In 1950s, the first hard disk drive showed up, 20 inches in diameter, store only 5MB of data Oops! 5MB? 11/7/2018 Hard Disk Dirve By Hui Bian

Hard Disk Dirve By Hui Bian Example of HDD History 11/7/2018 Hard Disk Dirve By Hui Bian

Hard Disk Dirve By Hui Bian Continue Primary communication device Main location of all data stored in PC Considered as Permanent storage compared with RAM Able to access data quickly Not removable from drive 11/7/2018 Hard Disk Dirve By Hui Bian

Hard Disk Dirve By Hui Bian Physical Components Disk Platters Spindle and Spindle motor Read/write heads Air filter Logic board Connectors and Jumpers 11/7/2018 Hard Disk Dirve By Hui Bian

Hard Disk Dirve By Hui Bian 11/7/2018 Hard Disk Dirve By Hui Bian

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 11/7/2018 Hard Disk Dirve By Hui Bian

Example of HDD Features 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 11/7/2018 Hard Disk Dirve By Hui Bian

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 11/7/2018 Hard Disk Dirve By Hui Bian

Hard Disk Dirve By Hui Bian 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 11/7/2018 Hard Disk Dirve By Hui Bian

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 11/7/2018 Hard Disk Dirve By Hui Bian

Hard Disk Dirve By Hui Bian 11/7/2018 Hard Disk Dirve By Hui Bian

Hard Disk Dirve By Hui Bian HDD Trends Areal Density: increase Capacity: increase in an accelerating rate Rotational Speed: faster and faster Form Factor: smaller and smaller Reliability: changing slowly 11/7/2018 Hard Disk Dirve By Hui Bian

Hard Disk Dirve By Hui Bian 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 11/7/2018 Hard Disk Dirve By Hui Bian

Hard Disk Dirve By Hui Bian 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/ 11/7/2018 Hard Disk Dirve By Hui Bian

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