Hard drive disk presentation

1. By: Akram Ali

2. What Are Hard Drive Disks?
 Hard Drives are the main storage device
for all the data on your computer
 It is where you store all your files,
documents and even your Operating
System
 They are often abbreviated as HDD or
called Hard Drives
 The Hard Drive is a storage device since
it is used to store data.

3. History Of Hard Drives
 Were invented in 1950
 Often called “fixed disks” which was a
codename for the IBM product
 They were very large measuring up to
twenty inches in diameter
 Later they were given the name “Hard
Drive” to differentiate them from Floppy
Disks

4. Early Hard Drives

5. Diagram Of The Hard Drive

6. Parts of The Hard Drive
 Spindle- The shaft that rotates in the
middle of the hard drive. Is attached to
the platter.
 Platter- A round magnetic plate inside
the hard drive. There are many platters
in a hard drive.
 Actuator & Actuator Arm- Is the part of
the hard drive where the read/write head
attaches.

7. Parts of The Hard Drive Cont.
 Read/Write Head- Is a instrument that
read or writes data on to a magnetic
plate
 Logic Board- A circuit board that controls
the Hard Drive and its functions
 SATA Power Connecter- Provides
electricity to hard drive so that it may
operate

8. Parts of The Hard Drive Cont.
 SATA Data Connector- Allows the hard
drive to communicate with other parts of
the computer and transfer data
 SATA: Serial Advanced Technology
Attachment. It is bus interface that
allows the connecting of mass storage
devices.

9. A Hard Drive In Operation

10. Specifications
 Capacity: Is how much data the hard
drive can store (ex. 500 GB)
 Rotational Speed: Measured in rotations
per minute(RPM). It is how fast the
spindle inside the hard drive can rotate
per minute (ex. 7200 RPM)
 Seek Speed: Measured in milliseconds,
it is the amount of time it takes for a
hard drive to find a specific piece of data

11. Specifications
 Interface: Is the connector that is used
for the hard drive to interface with the
computer. (ex. PATA,SATA,USB)
 Buffer: Is buffer memory that loads
information that the processor is likely to
ask for. This will keep the data flowing
smoothly.

12. Future Trends
 Hybrid Hard Drives: Is a hard drive that
holds all the components in a traditional
hard drive. However, now a small Solid
State Drive has been integrated into it.
Seagate, the manufacturer of the hard
drive, claims that the Hybrid Hard Drive
can be up to three times faster than a
traditional hard drive.

13. Additional Information
2011 Thailand Flooding
 Hard Drive Manufacturers have risen the prices by
20 to 40 percent, due to flooding.
 In Thailand, which is the second highest exporter of
hard drives in the world was flooded damaging many
of the factories and killed 377 people since July
2011.
 Western Digital predicts that it will not have
production back to pre-flood levels until the third
quarter of 2012.
 This has caused the price of computers to increase
and decrease sales all over the technology industry.

14. Works Cited
 http://www.pcworld.com/article/125778-
3/how_to_buy_a_hard_drive.html
 http://www.webopedia.com/TERM/A/actuator.html
 http://www.webopedia.com/TERM/H/head.html
 http://www.webopedia.com/TERM/P/platter.html
 http://www.webopedia.com/TERM/S/spindle.html
 http://www.webopedia.com/DidYouKnow/Hardware_Softw
are/2002/InsideHardDrive.asp
 http://www.pcmag.com/article2/0,2817,2397008,00.asp
 http://www.reuters.com/article/2011/10/28/us-thai-floods-
drives-idUSTRE79R66220111028
 http://www.infoworld.com/d/the-industry-standard/hard-
drive-shortages-continue-bite-tech-industry-184973