Storage

 Explain what a storage device is  Define the two storage operations  Define what a hard disk is and list the types  Define what a CD and DVD are.  List ways to properly care for CD’s and DVD’s.  Give examples of miniature storage devices.  Explain what a card reader is  Explain what micro-fiche and film are.

 Storage holds data, instructions, and information for future use  Consists of two parts Storage Device Storage Media

 Storage is nonvolatile where as RAM memory is volatile  Two operations associated with storage  Reading - Process of transferring items from storage media to memory  Writing - Process of transferring items from memory to storage media

 High-capacity storage consisting of several inflexible, circular platters that store items electronically  Components enclosed in airtight, sealed case for protection

Internal External Removable

 Flat, round, portable metal discs made of metal, plastic, and lacquer  Can be read only or read/write  Most PCs include CD or DVD drive, most play audio CDs  Are not re-writable

disc label

laser diode disc label

laser diode prism disc label

laser diode prism lens disc label

laser diode prism light- sensing diode lens disc label

laser diode prism light- sensing diode lens pit disc label

laser diode prism light- sensing diode lens pitland disc label

Items waiting to be interpreted and executed by the processor Memory (most RAM) Primary Storage Secondary Storage Operating system, application software, user data and information Hard Disk Software, backups, movies, music CDs and DVDs Digital pictures or small files to be transported Miniature Storage Media Backups Tape Small files to be transported Floppy Disk

 Do not expose the disc to excessive heat or sunlight  Do not eat, smoke, or drink near a disc  Do not touch the underside of the disc  Do not stack discs  Store disc in a jewel box when not in use  Hold disc by its edges

Smart Media xD Picture Card Compact FlashSecure Digital Memory StickMicrodrive

 And externals device that reads information stored on miniature mobile storage media

 Store microscopic images of documents on a roll or a sheet of film  Images recorded using a computer output microfilm (COM) recorder

Magnetic Disks3 to 5 Years20 to 30 years CD’s and DVD’s5 to 10 Years50 to 100 years Microfilm 100 years500 years Media TypeGuaranteedPotentialLifeExpectancy