Magnetic disks, both large and small, have a direct data access (direct access) to

the destination data, so the data is on disk can be directly accessed to the place

where data is stored. A magnetic disk storage can be referred to as direct access

storage devices (DASD). Disk technology is very useful for systems that require

immediate and fast access to data. This is because the DASD using a random file

structure (random) so rekord-rekord storage and calling back (retrieval) in a

magnetic disk without saving it in the order lojik and physical. Example: Play a

song on the CD-ROM. Currently the media is the most widely used magnetic disk.

There are 2 types of magnetic disks: hard disk and floppy disk.