Secondary Storage Chapter 7 Computing Essentials 2013 2013

Secondary Storage § Chapter 7 Computing Essentials 2013 © 2013 The Mc. Graw-Hill Companies, Inc. All rights reserved.

Secondary Storage § Primary storage § Volatile storage § Temporary storage § Random Access Memory (RAM) § Secondary storage § Nonvolatile storage § Permanent storage § Secondary storage characteristics § § Media Capacity Storage devices Access speed 8 -2 Computing Essentials 2013 © 2013 The Mc. Graw-Hill Companies, Inc. All rights reserved.

Secondary Storage § Use rigid, metallic platters that are stacked one on § § top of one another Store and organize files using tracks, sectors, and cylinders Large capacity (terabytes) Two types of hard disks: § Internal Hard Disk: Located inside system unit and often designated as the C: drive § External Hard Disks Performance enhancements 8 -3 Computing Essentials 2013 © 2013 The Mc. Graw-Hill Companies, Inc. All rights reserved.

Secondary Storage § Hold over 100 gigabytes (GB) of data § Three types § Compact Disc (CD) § Digital Versatile Disc (DVD) § Blu-Ray (Hi-Def) Disc 8 -5 Computing Essentials 2013 © 2013 The Mc. Graw-Hill Companies, Inc. All rights reserved.

Secondary Storage § Large amounts of secondary storage called mass storage that support enterprise storage systems § Devices include: § File servers: – dedicated computer with very large storage capacities § RAID systems: specialized devices that enhance organizational security by constantly making backup copies of files § Organizational cloud storage: – high speed internet connection to a dedicated remote organizational cloud storage server. Computing Essentials 2013 8 -9 © 2013 The Mc. Graw-Hill Companies, Inc. All rights reserved.