1. Hard Disks
1.1. Characteristics of a hard disk
1.1.1. Capacity
1.1.2. Platters
1.1.3. Read/Write Heads
1.1.4. Cylinders
1.1.5. Sectors and Tracks
1.1.6. Revolutions per Minute
1.1.7. Transfer Rate
1.1.8. Access Time
1.2. Hard disks can store data using longitudinal recording or perpendicular recordin
1.3. Formatting
1.3.1. is 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
1.4. RAID
1.4.1. (redundant array of independent disks) is a group of two or more integrated hard disks
2. Flash Memory Storage
2.1. Solid state drives (SSDs)
2.1.1. Faster access time
2.1.2. Faster transfer rates
2.1.3. Generate less heat and consume less power
2.1.4. Last longer
2.2. memory card
2.2.1. CompactFlash (CF)
2.2.2. Secure Digital (SD)
2.2.3. Secure Digital High Capacity (SDHC)
2.2.4. microSD
2.2.5. microSDHC
2.2.6. xD Picture Card
2.2.7. Memory Stick
2.2.8. Memory Stick Micro (M2)
2.3. USB flash drives
2.3.1. plug into a USB port on a computer or mobile device
3. Other Types of Storage
3.1. Tape
3.2. Magnetic stripe cards and smart cards
3.3. Microfilm and microfiche
3.4. Enterprise storage
4. holds data,instructions and information for future use
5. A storage medium
5.1. Capacity is the number of bytes a storage medium can hold
6. Cloud Storage
6.1. is an Internet service that provides storage to computer users
6.2. Access files from any computer
6.3. Store large files instantaneousl
6.4. Allow others to access their file
6.5. View time‐critical data and images immediately
6.6. Store offsite backups
6.7. Provide data center functions
7. Optical Discs
7.1. A CD‐ROM
7.1.1. can be read from but not written to
7.2. A CD‐R
7.2.1. is a multisession optical disc on which users can write, but not erase
7.3. A CD‐RW
7.3.1. is an erasable multisession dis
7.4. A DVD‐ROM
7.4.1. is a high‐capacity optical disc on which users can read but not write or erase
7.5. A Blu‐ray Disc‐ROM (BD‐ROM)
7.5.1. has a storage capacity of 100 GB
7.6. DVD‐RW, DVD+RW, and DVD+RAM
7.6.1. are high‐capacity rewritable DVD formats