Database Reference
In-Depth Information
At
o
m
su
rf
a
c
e den
s
ity
1000000
100000
Atom level
storage
10000
?
P
r
o
b
e
c
on
t
act a
r
ea
vi
a
bi
li
ty
1000
?
100
Magnetic disk
?
10
Optical disk
?
1
Linear tape
0.1
Helical tape
0.01
Parallel track
longitudinal tape
0.001
1987
1992
1997
2002
2007
2012
2017
2022
GA Year
(a)
Figure 1.3
(See color insert following page 224.) This figure summarizes
the evolution of area density and price for storage devices (Courtesy of Sun
Microsystems). Item (a) summarizes the trends in the areal density for dif-
ferent classes of storage media. Graph (b) shows the cost per bit for different
classes of storage media.
