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Types of external storage devices and RAID levels explained

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Jeanie Delos Arcos
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William Stallings Computer Organization and Architecture 7 th Edition Chapter 6 External Memory
Types of External Memory ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Magnetic Disk ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Read and Write Mechanisms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Inductive Write MR Read
Data Organization and Formatting ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Disk Data Layout
Disk Velocity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Disk Layout Methods Diagram
Finding Sectors ,[object Object],[object Object],[object Object],[object Object]
Winchester Disk Format Seagate ST506
Characteristics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fixed/Movable Head Disk ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Removable or Not ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Multiple Platter ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Multiple Platters
Tracks and Cylinders
Floppy Disk ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Winchester Hard Disk (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Winchester Hard Disk (2) ,[object Object],[object Object],[object Object],[object Object],[object Object]
Speed ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Timing of Disk I/O Transfer
RAID ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 0 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 1 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 3 ,[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 4 ,[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 5 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 6 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID 0, 1, 2
RAID 3 & 4
RAID 5 & 6
Data Mapping For RAID 0
Optical Storage CD-ROM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
CD Operation
CD-ROM Drive Speeds ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
CD-ROM Format ,[object Object],[object Object],[object Object]
Random Access on CD-ROM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
CD-ROM for & against ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Other Optical Storage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
DVD - what’s in a name? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
DVD - technology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
DVD – Writable ,[object Object],[object Object],[object Object],[object Object]
CD and DVD
Magnetic Tape ,[object Object],[object Object],[object Object],[object Object]
Internet Resources ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Types of external storage devices and RAID levels explained