Disk Storage Problem

- Aatman Kothari

The Problem

Question - A 6 disk pack has 600 tracks per surface, 10 sectors per track and 512 bytes per sector.

What is the storage capacity of 1 surface?

What is the storage capacity of disk pack?

How many cylinders does the disk pack have?

The Problem

Question - A 6 disk pack has 600 tracks per surface, 10 sectors per track and 512 bytes per sector.

What is the storage capacity of 1 surface?

What is the storage capacity of disk pack?

How many cylinders does the disk pack have?

Given :

▪1 Surface = 60 tracks

▪1 Track = 10 sector

▪1 Sector = 512 bytes

Storage capacity of 1 surface

▪ 1 track = 10 sectors x 512 bytes

▪ 1 surface = 600 tracks x 5120 bytes

3072000 bytes = 3.072 Megabyte

Storage capacity of disk pack

▪ 10 surfaces = 10 x 3072000 = 30720000 = 30.72 Mb

* Assuming total number of surfaces are 10

Cylinders in the disk pack

(600) Tracks

=

(600) Cylinders

The Answer

What is the storage capacity of 1 surface?

o 3.072 Mb

What is the storage capacity of disk pack?

o 30.72 Mb

How many cylinders does the disk pack have?

o 600 cylinders

Thank You!