774 views
1 votes
1 votes
We are given a hard disk of 500 GB. The performance details are :

• 5000 RPM rotation rate

• 200 cylinders, numbered from 1 to 200

• Takes 1 + (n/20) milliseconds to move heads across n cylinders (e.g.,

   from i to i + n).

• A constant transfer rate of 100MB/s on all tracks

Assume that, for an average read, the head travels half the cylinders and half a revolution.

The average time taken to read a 1MB block from the hard disk is__?

Need help.

1 Answer

5 votes
5 votes

After calculation I got  22msec as average time taken to read 1MB block

Related questions

2 votes
2 votes
2 answers
2