Secondary Storage

• Describe today's standard floppy disk and compare it to Zip, SuperDisk, and HiFD disks.
• Describe the following kinds of disks: internal hard disks, hard-disk cartridges, and hard-disk packs.
• Describe ways to improve hard-disk operations: disk caching, redundant arrays of inexpensive disk, and data compression.
• Compare the CD and DVD optical disk formats.
• Describe the different types of optical disks.
• Describe magnetic tape streamers and magnetic tape reels.

Key Terms

access time	file compression	magnetic tape unit
backup tape cartridge unit	file decompression	nonvolatile storage
CD (compact disc)	fixed disk	1.44MB disk
CD-R	flexible disk	pits
CD-ROM	floppies	redundant arrays of inexpensive disks (RAIDs)
CD-RW	floppy disk	sector
digital audiotape (DAT) drive	floppy-disk cartridge	SuperDisk
disk	hard disk	track
disk caching	hard-disk cartridge	2HD
diskette	hard-disk pack	volatile storage
DVD	head crash	WORM
DVD-R	HiFD disk	write-protect notch
DVD-RAM	internal hard disk	Zip disk
DVD-ROM	lands
DVD-RW	magnetic tape drive
erasable optical disk	magnetic tape streamer

    
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