1. Storage holds data, instructions, and information for future use
1.1. Capacityis the number of bytes a storage medium can hold
2. A storage mediumis the physical material on which a computer keeps data, instructions, and information
2.1. A storage deviceis the computer hardware that records and/or retrieves items to and from storage media
3. Hard Disks
3.1. A hard diskcontains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information
3.2. Hard disks can store data using longitudinal recording or perpendicular recording
3.3. Formattingis the process of dividing the disk into tracks and sectors so that the operating system can store and locate data and information on the disk
4. Flash Memory Storage
4.1. Flash memory chips are a type of solid state media and contain no moving parts
4.2. Flash memory chips are a type of solid state media and contain no moving parts
4.3. Solid state drives (SSDs) have several advantages over magnetic hard disks:
4.3.1. Faster access time
4.3.2. Faster transfer rates
4.3.3. Generate less heat and consume less power
4.3.4. Last longer
4.4. A memory cardis a removable flash memory device that you insert and remove from a slot in a computer, mobile device, or card reader/writer
4.4.1. CompactFlash(CF)
4.4.2. Secure Digital (SD)
4.4.3. Secure Digital High Capacity (SDHC)
4.4.4. microSD
4.4.5. microSDHC
4.4.6. microSDHCxDPicture Card
4.4.7. Memory Stick
4.4.8. Memory Stick Micro (M2)
4.5. USB flash drivesplug into a USB port on a computer or mobile device
4.6. An ExpressCardmoduleis a removable device that fits in an ExpressCardslot
4.7. Developed by the PCMCIA
4.8. Commonly used in notebook computers
5. Cloud Storage
5.1. Cloud storage is an Internet service that provides storage to computer users
5.2. Users subscribe to cloud storage for a variety of reasons:
5.2.1. Access files from any computer
5.2.2. Store large files instantaneously
5.2.3. Allow others to access their files
5.2.4. View time‐critical data and images immediately
5.2.5. Store offsite backups
5.2.6. Provide data center functions
6. Optical Discs
6.1. An optical disc consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a laser
6.2. Typically store software, data, digital photos, movies, and music
6.3. Read only vs. rewritable
6.4. Optical discs commonly store items in a single track that spirals from the center of the disc to the edge
6.5. Track is divided into evenly sized sectors
6.6. Care of optical discs
6.6.1. A CD‐ROMcan be read from but not written to•Read from a CD‐ROM driveor CD‐ROM player
6.6.2. A CD‐Ris a multisession optical disc on which users can write, but not erase
6.6.3. A CD‐RWis an erasable multisession disc•Must have a CD‐RW drive
6.7. Archive disc
6.7.1. Stores photos from an online photo center
6.7.2. Resolution usually is 7200 pixels per photo
6.7.3. Cost is determined by the number of photos being stored
6.8. Picture CD
6.8.1. Single‐session CD‐ROM that stores digital versions of film
6.8.2. Typically uses a 1024 x 1536 resolution
6.8.3. Many photo centers offer Picture CD services
7. Other Types of Storage
7.1. Tapeis a magnetically coated ribbon of plastic capable of storing large amounts of data and information
7.1.1. A tape drivereads and writes data and information on a tape
7.2. A magnetic stripe cardcontains a magnetic stripe that stores information
7.3. A smart cardstores data on a thin microprocessor embedded in the card
7.4. Microfilmand microfichestore microscopic images of documents on a roll or sheet flim
7.5. Enterprise storage stores huge volumes of data and information for large businesses – Uses special hardware for heavy use, maximum availability, and maximum efficiency
8. Putting It All Together
8.1. Home user• 320 GB hard disk• Cloud storage• Optical disc drive• Card reader/writer• USB flash drive
8.2. Small Office/Home Office user• 1 TB hard disk• Cloud storage• Optical disc drive• External hard disk for backup• USB flash drive
8.3. Mobile• 250 GB hard disk• Cloud storage• Optical disc drive• Card reader/writer• Portable hard disk for backup• USB flash drive
8.4. Power User• 2.5 TB hard disk• Cloud storage• Optical disc drive• Portable hard disk for backup• USB flash drive
8.5. Enterprise User (desktop computer)• 1 TB hard disk• Optical disc drive• Smart card reader• Tape drive• USB flash drive
8.6. Enterprise User(server or mainframe)• Network storage server• 40 TB hard disk system• Optical disc server•Microfilm or microfich
9. Summary
9.1. Various storage media and storage devices
9.1.1. Internal hard disks, external and removable hard disks, solid state drives, memory cards, USB flash drives, ExpressCardmodules, cloud storage, CDs, DVDs, and Blue‐ray Discs, tape, smart cards, and microfilm and microfiche