Storage Common Terms Types Primary Secondary Storage Media

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Storage

Storage

Common Terms • Types : – Primary – Secondary • • • Storage Media

Common Terms • Types : – Primary – Secondary • • • Storage Media Storage Device. Storage Term Capacity Access Time

Types • • • Magnetic Disks Optical Disks Miniature Mobile Storage Media Microflim and

Types • • • Magnetic Disks Optical Disks Miniature Mobile Storage Media Microflim and Microfiche Enterprise Storage

Magnetic Disks • Use magnetic particles to store. • Disk controller • Formatting –

Magnetic Disks • Use magnetic particles to store. • Disk controller • Formatting – Tracks – Sectors – cluster • Types of disks : – Floppy – Zip – Hard

Floppy Disk • • • Floppy Drive Density Access time 84 milliseconds Transfer rate

Floppy Disk • • • Floppy Drive Density Access time 84 milliseconds Transfer rate : 250 – 500 kbps Write protect Notch

Zip Disk • Zip Drive • Density • 100 MB – 750 MB

Zip Disk • Zip Drive • Density • 100 MB – 750 MB

Hard Disk • Hard Disk Drive • Capacity : 40 - 300 GB •

Hard Disk • Hard Disk Drive • Capacity : 40 - 300 GB • Capacity – – – – Platters Read / write Cylinders Sectors Tracks Rev. per minute Transfer rate Access time • Hard Disk Technology for Large computers – Removable Packs – Fixed disks – RAID Storage System

Optical Discs • Storage media is a round flat portable disc made of metal,

Optical Discs • Storage media is a round flat portable disc made of metal, plastic or lacquer that is written and read by laser. • Size – 4. 75 diameter and approx. 1/20 of a inch in thickness • Store in a single track that starts from the center and ends at the edge of the disc

Types • CDs – CDROM : • single session disc ; capacity 650 MB

Types • CDs – CDROM : • single session disc ; capacity 650 MB – 1 GB. • CD ROM drive transfer 150 kbps • Manufactures use a x to denote 50 x ( 50 X 150 ) – Picture CD – R : • CD Recordable • Reads at a speed of 48 X – CD – RW • • CD Rewritable. Write speed : 52 X , rewrite : 24 X, read speed : 52 X Burning ripping

DVDs • • Storage : 4. 7 to 17 GB 2 techniques of storage

DVDs • • Storage : 4. 7 to 17 GB 2 techniques of storage Some are double sided Types – DVD ROM – DVD RW

Magnetic Tape • • • Used for mainframe Magnetically coated ribbon of plastic Tape

Magnetic Tape • • • Used for mainframe Magnetically coated ribbon of plastic Tape drive Tape cartridge Sequential access

PC Cards • Thin film credit card sized device that fits into PC Card

PC Cards • Thin film credit card sized device that fits into PC Card slot • Types – Type III • Used in Notebook PC

Miniature Mobile Storage Media • Flash Memory Cards : – Capacity : 32 –

Miniature Mobile Storage Media • Flash Memory Cards : – Capacity : 32 – 1 GB, transfer rate : 1 – 10 mbps • USB Flash Drives – Pen drive – Plugs in a USB Port – Transfer rate : 12 MBPS; capacity : upto 4 GB • Smart Drives – Store data on the thin stripe of microprocessor embedded in the card – Place card in a reader it reads if required updates.

Microfilm and Microfiche • Store microscopic images on roll or sheet film • Microfilm

Microfilm and Microfiche • Store microscopic images on roll or sheet film • Microfilm : 100 – 215 roll of film • Microfinche : 4 – 6 inches • Device that records is computer output micro film recorder

Secondary Storage Management Hank Levy Secondary Storage SecondarySecondary Storage Management Hank Levy Secondary Storage Secondary
Storage Devices Program Data Secondary Storage Primary StorageStorage Devices Program Data Secondary Storage Primary Storage
Storage The two types of storage Primary StorageStorage The two types of storage Primary Storage
Primary and Secondary Sources Primary and Secondary SourcesPrimary and Secondary Sources Primary and Secondary Sources
Primary and Secondary Sources Defining Primary and SecondaryPrimary and Secondary Sources Defining Primary and Secondary
Primary versus Secondary Groups Primary Groups Secondary GroupsPrimary versus Secondary Groups Primary Groups Secondary Groups
PRIMARY SECONDARY SOURCES Definitions Examples Resources PRIMARY SECONDARYPRIMARY SECONDARY SOURCES Definitions Examples Resources PRIMARY SECONDARY
Secondary Storage Devices Magnetic Disks 1 Secondary StorageSecondary Storage Devices Magnetic Disks 1 Secondary Storage
Secondary Storage Memory Rashedul Hasan Secondary Storage NecessitySecondary Storage Memory Rashedul Hasan Secondary Storage Necessity
Secondary Storage Devices Ahijah Lane Secondary Storage DevisesSecondary Storage Devices Ahijah Lane Secondary Storage Devises
Secondary Storage Secondary storage typically is anything thatSecondary Storage Secondary storage typically is anything that
Secondary Storage Memory Rashedul Hasan Secondary Storage NecessitySecondary Storage Memory Rashedul Hasan Secondary Storage Necessity
Secondary storage Examples of Secondary Storage Hard DiskSecondary storage Examples of Secondary Storage Hard Disk