<s>
The	O
Bernoulli	B-Device
Box	I-Device
(	O
or	O
simply	O
Bernoulli	O
,	O
named	O
after	O
Daniel	O
Bernoulli	O
)	O
is	O
a	O
high-capacity	O
(	O
for	O
the	O
time	O
)	O
removable	O
floppy	B-Device
disk	I-Device
storage	O
system	O
that	O
is	O
Iomega	O
's	O
first	O
widely	O
known	O
product	O
.	O
</s>
<s>
The	O
drive	O
spins	O
a	O
PET	O
film	O
floppy	B-Device
disk	I-Device
at	O
about	O
3000	O
rpm	O
,	O
1μm	O
over	O
a	O
read-write	B-Device
head	I-Device
,	O
using	O
Bernoulli	O
's	O
principle	O
to	O
pull	O
the	O
flexible	B-Device
disk	I-Device
towards	O
the	O
head	O
as	O
long	O
as	O
the	O
disk	B-Device
is	O
spinning	O
.	O
</s>
<s>
In	O
theory	O
this	O
makes	O
the	O
Bernoulli	B-Device
drive	I-Device
more	O
reliable	O
than	O
a	O
contemporary	O
hard	B-Device
disk	I-Device
drive	I-Device
,	O
since	O
a	O
head	O
crash	O
is	O
impossible	O
.	O
</s>
<s>
The	O
original	O
Bernoulli	O
disks	B-Device
came	O
in	O
capacities	O
of	O
5	O
,	O
10	O
,	O
and	O
20MB	O
.	O
</s>
<s>
The	O
most	O
popular	O
system	O
was	O
the	O
Bernoulli	B-Device
Box	I-Device
II	O
,	O
whose	O
disk	B-Device
cases	O
are	O
13.6cm	O
wide	O
,	O
14cm	O
long	O
and	O
0.9cm	O
thick	O
,	O
somewhat	O
resembling	O
a	O
3	O
-inch	O
standard	O
floppy	B-Device
disk	I-Device
but	O
in	O
5	O
-inch	O
form	O
factor	O
.	O
</s>
<s>
Bernoulli	B-Device
Box	I-Device
II	O
disks	B-Device
came	O
in	O
the	O
following	O
capacities	O
:	O
20MB	O
,	O
35MB	O
,	O
44MB	O
,	O
65MB	O
,	O
90MB	O
(	O
late	O
1980s	O
)	O
,	O
105MB	O
,	O
150MB	O
,	O
and	O
in	O
1993	O
,	O
230MB	O
.	O
</s>
<s>
The	O
interface	O
is	O
usually	O
SCSI	B-Architecture
.	O
</s>
<s>
Drives	O
were	O
available	O
as	O
either	O
internal	O
units	O
,	O
which	O
fit	O
into	O
standard	O
5	O
-inch	O
drive	B-Device
bays	I-Device
,	O
or	O
as	O
external	O
units	O
with	O
one	O
or	O
two	O
drives	O
in	O
a	O
self-contained	O
case	O
connected	O
to	O
the	O
host	O
computer	O
via	O
external	O
SCSI	B-Architecture
connector	O
.	O
</s>
<s>
The	O
disks	B-Device
have	O
a	O
physical	O
switch	O
similar	O
to	O
that	O
on	O
3	O
-inch	O
standard	O
floppy	B-Device
disks	I-Device
to	O
enable	O
and	O
disable	O
write	B-Device
protection	I-Device
.	O
</s>
<s>
PC	O
Magazine	O
in	O
1984	O
stated	O
that	O
the	O
Bernoulli	B-Device
Box	I-Device
"	O
...	O
combines	O
the	O
advantages	O
of	O
 [ standard ] 	O
floppy	B-Device
-	O
and	O
hard-disk	B-Device
systems	O
without	O
their	O
drawbacks.	O
"	O
</s>
<s>
Bruce	O
Webster	O
of	O
BYTE	B-Application
wrote	O
favorably	O
of	O
the	O
peripheral	O
in	O
February	O
1986	O
,	O
reporting	O
that	O
"	O
I	O
have	O
not	O
had	O
a	O
single	O
glitch	O
or	O
lost	O
file	O
"	O
in	O
nine	O
months	O
of	O
constant	O
use	O
.	O
</s>
<s>
Iomega	O
's	O
later	O
removable-storage	O
products	O
such	O
as	O
the	O
Zip	B-Operating_System
floppy	B-Device
disk	I-Device
and	O
Jaz	B-Device
and	O
Rev	B-Device
removable	O
hard	B-Device
disks	I-Device
do	O
not	O
use	O
the	O
Bernoulli	O
technology	O
.	O
</s>
