McMillenS20Wk7h1

McMillenS20Wk7h1 - 1. What does formatting do? Define...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1. What does formatting do? Define "track", "sector" and "cluster". (7 points) Answer: Formatting is a method for dividing the regions of a magnetic disk into tracks, sectors and clusters. A track is a narrow recording band that forms a full circle on the surface of the disk. The storage locations on a disk are pie-shaped sections, each of which breaks the tracks into small arcs called sectors. Clusters are groups (between 2 and 8) of sectors. 2. When is a disk cache used? How does it affect the access time of a hard disk? (7 points) Answer: A Disk cache is used when there are items that are frequently accessed. It improves access time significantly. 3. What is an optical disc? How do lasers read information off of an optical disc? (7 points) Answer: Optical discs are removable disc media that store all forms of information by using microscopic pits and lands. A laser light is reflected through the bottom of the disc and read by a light sensing diode. 4. You need to write a student mid-term self evaluation letter.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/31/2011 for the course COMS 103 taught by Professor Chang during the Fall '06 term at Iowa State.

Page1 / 3

McMillenS20Wk7h1 - 1. What does formatting do? Define...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online