Radio Shack TRS-80 Hardware Manual page 18

A
floppy disk drive
is
both
one
physical drive
and one
logical
drive.
A
hard
disk driva
is
one
physical
driw
thai
you can
separate
inio
several logical drives.
The drawing below
illustrates this
concept:
1
Logical
Drive
2
Loyitul
Drives
Physical Drive
3
S-d gi
--*!
I
Drives
4
Logical
Drives
Logical Drive
Figure
6.
Physical
v
Logical Drivus
Several lactors
may
'nfluertce
the
number
of logical drives you
want.
• >fcu
can
put
similar
fifes,
such as
all
accounting data
files,
in
one
log cal drive so that you
can
operate on (heir as
a
group. For example, you
can back them
up,
without
affecting the
files in
other logical drives.
•
Some
application
programs
require a
certain
number
of
logical driven.
•
The
maximum number
of files
any
logical drive
can have
ig240.
•
By
putting
a
gro
up
of
f iles in
a
log
ical
d
ri
ve,
you ca
n
assign
Ihtr files
a
master
passwurd
that protects
them
from being
erased
or copied.
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