Hard disks are used for long-term storage of data in computers. They use magnetic platters coated with magnetic material and read/write heads to store and retrieve data. Common interfaces for connecting hard disks to computers include IDE, EIDE, SCSI, and Serial ATA. Capacities range from megabytes to terabytes. Hard disk specifications include RPM, cache size, interface type, capacity, and warranty duration. Examples of hard disk brands are Western Digital and Seagate.

1. Hard disk)

2. Hard disk)
hard disk)
motherboard)
PATA) , SATA)
SCSI)
Apple
eSATA)

3. kb
- mb tb (2048gb)
-
-
-

4. Clusters)
Low -level format )
High-

6. track)

7. clean room

9. Hard Disk
Actuator Arm )
Stepping Motor
Stepping Motor Voice
Coil
Stepping Motor

10. Head )
Platters )

11. Hard Disk
Rovolution Per Minute
RPM ) Hard Disk
Hard
Disk Case )

12. Data buffer)
CPU)

13. ST-506/41L
ESDI (enhanced small device interfaues)
SCSI (Small Computer System Interface)
IDE (Integrated Drive Electronics)

14. IDE
EIDE ( Enhanced
IDE) SCSI
Server Workstation Serial ATA
PC

15. 1. IDE (EIDE)
IDE EIDE
(Enhanced Integrated Drive Electronic)
IDE
MB
Ultra ATA
(Ultra DMA)/33,/66,/100,/133
MB/s
ATA/33
ATA/66/100/133
IDE

16. 2. SCSI
Small Computer Interface
MB/s
SCSI 2
SCSI)
SCSI SCSI
-

17. Serial ATA
SATA
IDE
IDE Serial ATA
1.0 MB/s
MB/s SATA

18. Hard Disk
Interface)
IDE (Integrate Drive Electronics)
Hard Disk IDE
Hard Disk
IDE
Hard Disk
MB

19. E-IDE (Enhanced Integrated Drive
Electronics)
Hard Disk E-IDE IDE
IDE
Hard Disk E-IDE
MB
Hard Disk E-IDE
PIO DMA
PIO (Programmed Input Output)
Hard Disk Hard
Disk
Hard Disk
Multitasking environment

20. SCSI (Small Computer System
Interface)
Hard Disk SCSI Hard Disk
E-IDE Hard Disk SCSI
SCSI
SCSI
SCSI
SCSI
SCSI
E-IDE Hard Disk SCSI
Server)

21. Serial ATA
Parallel ATA E-IDE
Serial ATA
Serial ATA
Bandwidth) -
Hard Disk
CD-RW DVD

22. Western Digital (WD) 3.5 SATA
Internal)
WD7500AYPS
Western Digital
WD RE2-GP 750 GB SATA Hard Drives
( WD7500AYPS )
THB
GB- 7200RPM- RAID
EDITION 2-GREEN POWER
Western Digital(WD) GB
Interface SATA
Shipping per bit : 70.00 THB

23. Western Digital (WD) 3.5 SATA
Internal)
WD7500AAKS
Western Digital
WD Caviar Blue 750 GB SATA
Hard Drives
THB
GB 7200RPM
16MB SATA 300 MB/SEC 5YRS
WARRANTY
Western Digital(WD) GB
Interface SATA

24. Western Digital(WD) 3.5 SATA
Internal)
WD5000AAKS
Western Digital
WD Caviar Blue 500 GB SATA
Hard Drives
THB
GB 7200RPM
16MB SATA 300 MB/SEC 5YRS
WARRANTY
Western Digital(WD) GB
Interface SATA

25. Western Digital (WD) 3.5 SATA
Internal)
WD1000FYPS
THB
TB- 7200RPM- SATA II
–
RAID EDITION 24X7
Western Digital(WD)
TB Interface
SATA RAID)
Shipping per bit : 70.00 THB
Western Digital
WD RE2-GP 1 TB SATA Hard Drives

26. Western Digital (WD) 2.5
Notebook SATA - IDE Internal)
WD5000BEVT
Western Digital
WD Scorpio Blue 500 GB SATA
Hard Drives
THB
HDD NB 2.5- 500GB-
5400RPM-SATA2-8MB-5YRS WARRANTY
Notebook Western
Digital(WD) GB
Interface SATA
Shipping per bit : 70.00 THB

27. Western Digital (WD) 2.5
Notebook SATA - IDE Internal)
WD1200BEVE
Western Digital
WD Scorpio Blue 120 GB EIDE
Hard Drives
THB
HDD NB 2.5- 120GB-5400RPM-PATA-8MB-5YRSWARRANTY
Notebook Western
Digital(WD) GB Interface
ATA

28. Western Digital (WD) 3.5 IDE (ATA)
Internal)
WD5000AAKB
Western Digital
WD Caviar Blue 500 GB EIDE
Hard Drives
THB
GB 7200RPM 8MB ATA 100 5YRS WARRANTY
Western Digital(WD) GB
Interface ATA

29. Western Digital (WD) 3.5 IDE (ATA)
Internal)
WD1600AAJB
Western Digital
WD Caviar Blue 160 GB EIDE
Hard Drives
THB
HDD-EIDE-160GB-7200RPM-8MBCACHE-8MS
Western Digital(WD) GB
Interface ATA

30. Hard disk
1.