logging in or signing up Seconadary storage devices final aSGuest43877 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 4960 Category: Science & Tech.. License: All Rights Reserved Like it (3) Dislike it (0) Added: May 01, 2010 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Memory Representation : Memory Representation Memory hierarchy Internal Processor memory Primary memory Secondary memory 1 Memory Representation : Memory Representation 2 Secondary Storage Devices : Secondary Storage Devices 3 Secondary storage devices facilitates storing of information and programs permanently. Sequential Access Magnetic Tape Direct Access Magnetic Disks : FDD, HDD, ZIP Disk Optical Disks : CD ROM, DVD Magneto Optical Disks Secondary Storage Devices : Secondary Storage Devices 4 ER. Avinash Bhagat , Senior Lecturer Traditional Floppy Diskette : 8-5 Traditional Floppy Diskette ER. Avinash Bhagat , Senior Lecturer Direct Access Storage Devices : magnetic hard and floppy disks removable hard disks optical discs CD-ROM, CD-R, CD-RW, DVD GEOMETRY: TRACKS and SECTORS Direct Access Storage Devices 6 Floppy Disks : Floppy Disks Diskettes Floppies Portable storage media Floppy disk drives (FDD) 7 Types of Floppies : Types of Floppies High capacity Known as a floppy-disk cartridge Require special disk drives Three well known types Zip disks HiFD disks SuperDisks 8 Hard Disks : 8-9 Hard Disks Use thicker, metallic platters for storage Faster than a floppy diskette Large capacity Sensitive instruments Internal Hard Disk : Internal Hard Disk Located inside system unit Known as a fixed disk Designated as the C drive Advantages over floppies Access speed Capacity 10 Hard-Disk Cartridges : Hard-Disk Cartridges Removable hard disks Used to complement internal hard disk Capacities of 10 to 20 GB 11 Hard-Disk Packs : Hard-Disk Packs Removable Massive storage capacity Common in mainframes Resembles stack of vinyl records 12 Hard-Disk Pack : Hard-Disk Pack 13 Optical Disks : Optical Disks Compact Permanent storage Laser beams reflect off pits Two common types CD DVD 14 Compact Disc : Compact Disc Optical format From 650 MB to 1 GB capacity Rotation speeds vary Types Read only: CD-ROM Write once: CD-R Rewriteable: CD-RW Picture CDs and Photo CDs 15 Digital Versatile Disc : Digital Versatile Disc Digital Versatile Disk or Digital Video Disk (DVD) Similar to CDs, but can store more data Types Read only Write once Rewritable 16 CD-ROM : density: 16,000 tpi up to 650 MBytes Non-erasable, non-writeable storage discs are mastered, pressed (mass production) Multi-speeds drives common CD-ROM 17 CD–R : discs are “burnt” one at a time high intensity laser beam used for recording pregrooved tracks low intensity beam for reading attributes similar to CD-ROM CD–R 18 CD-RW : CD-RW CD-ReWritable--writable, erasable disc optical phase-change recording Erased, written up to 1,000 times UDF (Universal Disk Format) variable-length packets fixed-length packets 19 DVD : DVD Digital Versatile Disc second generation CD-ROM higher capacity: higher data density multiple sides multiple layers 20 ER. Avinash Bhagat , Senior Lecturer DataPlay : DataPlay Optical disk Write once format Quarter size 500 MB capacity Holds 5 hours of CD-quality sound Use for storing and playing music files 21 Other Types of Secondary Storage : Other Types of Secondary Storage Solid-state storage Internet hard drives Magnetic tape 22 Solid-State Storage : Solid-State Storage Flash memory cards Widely used in notebook computers Used to record MP3 music files Key chain hard drives Key chain flash memory devices Connects to a USB port 23 Internet Hard Drives : Internet Hard Drives 24 ER. Avinash Bhagat , Senior Lecturer Magnetic Tape : Magnetic Tape External storage Provides sequential access Information stored in sequence Slower than disks which provide direct access Magnetic tape streamers or tape cartridges used by both mainframes and microcomputers 25 A Look to the FutureBlu-Ray Technology : A Look to the FutureBlu-Ray Technology New standard in storage Blu-Ray New disks use blue laser light instead of the red laser light used in traditional CD players Disks may ultimately hold Over 30GB on one-sided disks Over 50GB on two-sided disks 26 You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.