Chapter 3 Storage Device 3.1 Main Memory 3.2 Secondary Storage 3.1 Main Memory 3.2 Secondary...
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Transcript of Chapter 3 Storage Device 3.1 Main Memory 3.2 Secondary Storage 3.1 Main Memory 3.2 Secondary...
Chapter 3Storage DeviceChapter 3Storage Device
3.1 Main Memory
3.2 Secondary Storage
3.1 Main Memory
3.2 Secondary Storage
Page 2© DVEP 2003
3.1Main Memory3.1Main Memory
Try to point out Random Access Memory (RAM), floppy disk drive, CR-ROM drives and hard disk drives in the following diagram
Page 3© DVEP 2003
3.1Main Memory3.1Main Memory
Read-Only Memory (ROM)
Motherboard
ROM chip
BIOS Setting screen
Page 4© DVEP 2003
3.1Main Memory3.1Main Memory
Random Access Memory (RAM)
RAM modules
Page 5© DVEP 2003
3.1Main Memory3.1Main Memory
Differences between ROM and RAM
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Floppy Disk and Floppy Disk Drive
Hard Disk Drive
3.2 Secondary Storage3.2 Secondary Storage
Floppy disk Floppy
disk drive
LS-120Zip
Hard disk drive
Page 7© DVEP 2003
3.2 Secondary Storage3.2 Secondary Storage
CD-ROM and CD-ROM Drive
CR-ROM drive
Page 8© DVEP 2003
3.2 Secondary Storage3.2 Secondary Storage
Memory Card and Reader
‧All-in-one memory card reader
‧CompactFlash card
‧SmartMedia card
‧Memory Stick card
‧Secure Digital card
‧eXtreme Digital card
‧Microdrive
‧USB flash storage / USB thumb drive
‧Magnetic tape drive
‧Mini DV tape
3.3 KB,MB,GB,TB, …3.3 KB,MB,GB,TB, …
Unit Approximate value Actual Value1 KB 1,000 B 1,024 B1 MB (= 1024 KB) 1,000,000 B 1,048,576 B1 GB (= 1024 MB) 1,000,000,000 B 1,073,741,824 B1 TB (= 1024 GB) 1,000,000,000,000 B 1,099,511,627,776 B
Page 9© DVEP 2003
1 B = 1Byte
1b = 1 bit
1B (Byte) = 8b (bit)
1 bit is the smallest unit of data in computer system.
CalculationCalculation
374,784,000
1024 * 1024
= 357.421875 MB
357MB
Page 10© DVEP 2003
3.4 Common capacities3.4 Common capacities
CD 650MB (normal; max 800MB)
DVD 4.7GB
Harddisks 160GB – 2TB (2048GB)
Memory Cards / USB Thumb drives 1GB – 32GB
Floppy disks 1.44MB
Page 11© DVEP 2003
Page 12© DVEP 2003
KeywordsKeywords
唯讀光碟 CD Read-Only Memory (CD-ROM)
可燒錄光碟 CD-Recordable (CD-R)
可重複讀寫光碟 CD-Rewritable (CD-RW)
光碟機 CD drive
光碟燒錄機 CD writer
字節 /位元組 Byte
位元 bit
基本輸入輸出系統 Basic Input/Output System (BIOS)
唯讀記憶體 Read-Only Memory (ROM)
開機自我檢測 Power-On Self Test (POST)
數位影音光碟 Digital Video Disk (DVD)
隨機存取記憶體 Random Access Memory (RAM)
Chapter 3Storage Device
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Chapter 3Storage Device
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