Epson Apex 20020 - Manual (Page 60)

Your computer uses the read/write heads in a disk drive to store
and retrieve data on a disk. There is one head above the
diskette and one below, so the drive can write to both sides of
the diskette. To write to a disk, the computer spins it in the
drive to a position where one of the read/write heads can access
the diskette through the read/write slot. The read/write slot
on a diskette exposes the diskette’s magnetic surface so the
read/write head can write on the appropriate area.
Because data is stored magnetically, you can retrieve it, record
over it, and erase it-just as you play, record, and erase music
on a cassette tape.
Types of Diskette Drives
Your computer has at least one 1.2MB diskette drive. With this
drive, use 5¼-inch, double-sided, high-density, 96 TPI, 1.2MB
diskettes. These diskettes contain 80 tracks per side, 15 sectors
per track, and hold up to 1.2MB of information, which is
approximately 500 pages of text. You can also format these
diskettes for 360KB—see your MS-DOS Reference Manual for
more information.
In addition, you may have a diskette drive of a different type.
The following list describes the types of optional diskette drives
you can use in your computer and which diskettes you should
use with them:
360KB drive-With this drive, use 5¼-inch, double-sided,
double-density, 48 TPI (tracks per inch), 360KB diskettes.
(You can also use single-sided, 160KB or 180KB diskettes.)
These diskettes contain 40 tracks per side, 8 or 9 sectors per
track, and hold up to 360KB of information, which is
approximately 150 pages of text, (With 8 sectors per track,
a diskette holds up to 320KB.)