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E0001 Computers in Engineering Secondary storage
Readings zShelly Chapter 6 zShelly Chapter 5 zShelly Chapter 6 zMeyer Chapter 2B zMeyer Chapter 2B
zFloppy disks zHard disks zOptical discs zMagnetic Tape Types of Secondary Storage
Tracks and Sectors
Floppy Disk Capacity z3 1/2 inch ydouble sided; double density - 720kB ydouble sided ; high density MB z5 1/4 inch ydouble sided; double density - 360kB ydouble sided ; high density - 1.2kB
Storage terms zkilobyte - KB bytes zmegabyte - MB bytes zgigabyte - GB bytes zterrabyte - TB bytes
Care of disks
How a disk drive works z360 revolutions per minute zread-write heads zaccess arm zseek and search operation zaccess time
How data is stored
Hard disks zinternal disks zhard disk cartridges zhard disk packs
Performance Enhancements zdisk caching zdata compression and decompression zRAIDS - redundant arrays of inexpensive disks (RAIDs)
Optical discs z650 MB of data zlaser beam zthree kinds yCD-ROM yCD-R yerasable optical discs
Magnetic Tape zStreamers ycartridge unit ydigital audiotape (DAT) zReels
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