<s>
This	O
is	O
a	O
list	O
of	O
different	O
floppy	B-Device
disk	I-Device
formats	O
.	O
</s>
<s>
This	O
is	O
a	O
list	O
of	O
8-inch	B-Device
floppy	I-Device
diskette	B-Device
formats	I-Device
as	O
introduced	O
by	O
IBM	O
.	O
</s>
<s>
Note	O
:	O
"	O
RX02	O
8-inch	B-Device
Floppy	I-Device
Drive	O
Information	O
"	O
.	O
</s>
<s>
Also	O
in	O
double	O
density	O
mode	O
the	O
standard	O
MFM	B-Protocol
encoding	I-Protocol
was	O
modified	O
from	O
the	O
standard	O
to	O
prevent	O
false	O
header	O
detection	O
in	O
data	O
.	O
</s>
<s>
Disk	O
Form	O
factorFloppy	O
disk	O
sizes	O
are	O
almost	O
universally	O
referred	O
to	O
in	O
inch	O
measurements	O
,	O
even	O
in	O
countries	O
where	O
metric	O
is	O
the	O
standard	O
,	O
and	O
even	O
when	O
the	O
size	O
is	O
in	O
fact	O
defined	O
in	O
SI	O
;	O
for	O
instance	O
,	O
the	O
3-inch	O
floppy	B-Device
is	O
defined	O
as	O
90	O
mm	O
.	O
</s>
<s>
Year	O
introduced	O
Formatted	O
storage	O
capacity( in	O
KB	O
=	O
1024	O
bytes	B-Application
if	O
not	O
stated	O
)	O
Marketed	O
capacity	O
IBM	O
23FD	O
8-inch	O
1971	O
79.75	O
?	O
</s>
<s>
Memorex	O
650	O
8-inch	O
1972	O
175	O
kB	O
1.5	O
megabit	O
unformatted	O
Memorex	O
651	O
8-inch	O
1972	O
264	O
2.5	O
megabit	O
unformatted	O
IBM	O
33FD	O
/	O
Shugart	O
901	O
8-inch	O
SSSD	O
1973	O
237.25	O
3.1	O
Mbits	O
unformatted	O
IBM	O
43FD	O
/	O
Shugart	O
850	O
8-inch	O
DSSD	O
1976	O
500.5	O
6.2	O
Mbits	O
unformatted	O
Shugart	O
SA	O
400	O
5-inch	O
(	O
35	O
track	O
)	O
1976	O
87.5	O
110	O
kB	O
IBM	O
53FD	O
/	O
Shugart	O
850	O
8-inch	O
DSDD	O
1977	O
980	O
(	O
CP/M	B-Application
)	O
-1	O
,	O
200	O
(	O
FAT	B-Application
)	O
1.2	O
MB	O
5-inch	O
DSDD	O
1978	O
360	O
or	O
800	O
360	O
KB	O
HP	O
single	O
sided	O
3-inch	O
1982280	O
264	O
KB	O
Compact	O
Floppy	B-Device
CF2	O
3-inch	O
1982	O
360	O
500	O
KB	O
3-inch	O
DD	O
1984	O
720	O
720	O
KB	O
5-inch	O
QD	O
720	O
720	O
KBVictor	O
9000	O
/	O
ACT	O
Sirius	O
15-inch	O
SSDD	O
1982	O
612	O
600	O
KBVictor	O
9000	O
/	O
ACT	O
Sirius	O
15-inch	O
DSDD	O
1982	O
1196	O
1.2	O
MB	O
5-inch	O
HD	O
1982	O
YE	O
Data	O
YD3801986	O
Disk/Trend	O
Report	O
,	O
Flexible	B-Device
Disk	I-Device
Drives	O
1,200	O
1.2	O
MB	O
3-inch	O
DD	O
1984	O
720	O
?	O
</s>
<s>
2,880	O
2.88	O
MB	O
(	O
4	O
MB	O
unformatted	O
)	O
2TD	O
drive	O
in	O
NEC	B-Device
PC-88	I-Device
VA3	I-Device
3-inch	O
TD	O
1988	O
ca	O
.	O
</s>
<s>
9.3	O
MB	O
12.5	O
MB	O
(	O
13	O
MB	O
unformatted	O
)	O
Fujifilm	O
LT-1	O
in	O
Zenith	B-Device
Minisport	I-Device
2-inch	O
1989	O
?	O
</s>
<s>
720	O
KB	O
(	O
245	O
tpi	O
,	O
80	O
tracks/side	O
,	O
double-sided	O
,	O
double-density	O
)	O
Flextra	O
BR3020	O
3-inch	O
1990	O
21,040	O
KB	O
21.4	O
MB	O
(	O
25	O
MB	O
unformatted	O
)	O
,	O
double-sided	O
,	O
526	O
cylinders	O
×	O
40	O
sectors	O
×	O
512	O
bytes	B-Application
Floptical	B-Device
3-inch	O
1990	O
20,385	O
?	O
</s>
<s>
21	O
MB	O
,	O
DS	O
,	O
755	O
cylinders	O
x	O
27	O
sectors	O
per	O
side	O
x	O
512	O
bytes	B-Application
Flextra	O
BR3225	O
3-inch	O
1992	O
?	O
</s>
<s>
50	O
MB	O
unformatted	O
,	O
double-sided	O
LS-120	B-Device
3-inch	O
1996	O
120.375	O
MB	O
120	O
MB	O
,	O
1,736	O
cylinders	O
,	O
51-93	O
sectors	O
,	O
26K	O
to	O
47	O
KB/track	O
UHD144	B-Device
3-inch	O
1997/1998	O
144	O
MB	O
144	O
MB	O
,	O
1,960	O
cylinders	O
,	O
50-90	O
sectors	O
,	O
RLL	O
,	O
281,504	O
sectors	O
HiFD	O
150	O
3-inch	O
1998	O
150	O
MB	O
150	O
MB	O
HiFD	O
200	O
3-inch	O
1999	O
200	O
MB	O
200	O
MB	O
LS-240	B-Device
3-inch	O
2000/2001	O
240.75	O
MB	O
240	O
MBAbbreviations	O
:	O
;	O
;	O
;	O
;	O
;	O
;	O
;;	O
The	O
formatted	O
capacities	O
of	O
floppy	B-Device
disks	I-Device
is	O
less	O
than	O
the	O
unformatted	O
capacity	O
,	O
which	O
does	O
not	O
include	O
the	O
sector	O
and	O
track	O
headings	O
required	O
for	O
use	O
of	O
the	O
disk	O
.	O
</s>
<s>
Individual	O
formatted	O
sector	O
lengths	O
are	O
arbitrarily	O
set	O
as	O
powers	O
of	O
2	O
(	O
256	O
bytes	B-Application
,	O
512	O
bytes	B-Application
,	O
etc	O
.	O
</s>
<s>
The	O
"	O
1.44	O
MB	O
"	O
value	O
for	O
the	O
3-inch	O
HD	O
floppies	B-Device
is	O
the	O
most	O
widely	O
known	O
example	O
;	O
where	O
the	O
"	O
M	O
"	O
prefix	O
is	O
peculiar	O
to	O
the	O
context	O
of	O
the	O
disk	O
drive	O
and	O
represents	O
neither	O
a	O
decimal	O
million	O
nor	O
a	O
mebibyte	O
2	O
.	O
</s>
<s>
+	O
Common	O
floppy	B-Device
disk	I-Device
formats	O
,	O
logical	O
characteristics	O
by	O
platformPlatform	O
Size	O
Density	O
Bytes/	O
sector	O
Sectors/	O
track	O
Tracks/	O
side	O
Sides	O
Capacity	O
rpm	O
Encoding	O
Note	O
Acorn	O
5-inch	O
Single	O
256	O
10	O
40	O
1	O
100	O
KB	O
300	O
FM	B-Protocol
80	O
200	O
KB	O
Double	O
256	O
16	O
40	O
1	O
160	O
KB	O
MFM	B-Protocol
80	O
320	O
KB	O
2	O
640	O
KB	O
3-inch	O
(	O
90	O
mm	O
)	O
Double	O
256	O
16	O
80	O
2	O
640	O
KB	O
300	O
MFM	B-Protocol
Format	O
L	O
:	O
MOS	O
(	O
Electron	O
,	O
Master	O
Compact	O
)	O
1024	O
5	O
800	O
KB	O
High	O
10	O
1600	O
KB	O
Format	O
F	O
:	O
RISC	O
OS	O
3	O
and	O
later	O
.	O
</s>
<s>
Archimedes	O
models	O
before	O
the	O
A5000	O
require	O
an	O
upgraded	O
floppy	B-Device
drive	I-Device
.	O
</s>
<s>
Agat	B-Device
5-inch	O
Double	O
256	O
21	O
80	O
2	O
840	O
KB	O
300	O
MFM	B-Protocol
Custom	O
controller	O
with	O
unique	O
track	O
layout	O
.	O
</s>
<s>
Amstrad	O
CPC/PCW	O
3-inch	O
Double	O
512	O
9	O
40	O
1	O
180	O
KB	O
300	O
MFM	B-Protocol
Single	O
head	O
drive	O
,	O
but	O
double-sided	O
floppy	B-Device
discs	I-Device
(	O
total	O
of	O
360	O
KB	O
per	O
floppy	B-Device
)	O
Amstrad	B-Device
PCW8512/9512	I-Device
3-inch	O
Double	O
512	O
9	O
80	O
2	O
720	O
KB	O
300	O
MFM	B-Protocol
720	O
KB	O
mode	O
uses	O
both	O
sides	O
-	O
ensure	O
disc	O
inserted	O
correct	O
way	O
up	O
.	O
</s>
<s>
Apple	B-Device
II	I-Device
5-inch	O
Double	O
256	O
13	O
35	O
1	O
113.75	O
KB	O
300	O
GCR	B-Device
16	O
sector	O
filesystems	O
require	O
a	O
compatible	O
disk	O
controller	O
(	O
PROM	O
update	O
)	O
and	O
Apple	O
DOS	O
3.3	O
or	O
later	O
.	O
</s>
<s>
16	O
1	O
140	O
KB	O
3-inch	O
(	O
90	O
mm	O
)	O
Double	O
512	O
Variable	O
(	O
8-12	O
)	O
80	O
1	O
400	O
KB	O
394	O
-	O
590	O
GCR	B-Device
Apple	B-Device
II	I-Device
double-density	O
3-inch	O
(	O
90	O
mm	O
)	O
drives	O
use	O
variable	O
sectors	O
sizes	O
(	O
tracks	O
00-15	O
:	O
12	O
sectors	O
,	O
tracks	O
16-31	O
:	O
11	O
sectors	O
,	O
tracks	O
32-47	O
:	O
10	O
sectors	O
,	O
tracks	O
48-63	O
:	O
9	O
sectors	O
,	O
tracks	O
64-79	O
:	O
8	O
sectors	O
)	O
,	O
394	O
rpm	O
to	O
590	O
rpm	O
.	O
</s>
<s>
2	O
800	O
KB	O
High	O
512	O
18	O
80	O
2	O
1440	O
KB	O
300	O
MFM	B-Protocol
Apple	B-Device
II	I-Device
high-density	O
3-inch	O
(	O
90	O
mm	O
)	O
drives	O
require	O
a	O
compatible	O
disk	O
controller	O
and	O
ProDOS	O
8	O
.	O
</s>
<s>
Apple	B-Device
Lisa	I-Device
5-inch	O
FileWare	B-Device
Double	O
512	O
Variable	O
(	O
15-22	O
)	O
46	O
2	O
851	O
KB	O
218	O
-	O
320	O
GCR	B-Device
Apple	B-Device
Lisa	I-Device
2/Macintosh	O
XL	O
3-inch	O
(	O
90	O
mm	O
)	O
Double	O
512	O
Variable	O
(	O
8-12	O
)	O
80	O
1	O
400	O
KB	O
394	O
-	O
590	O
GCR	B-Device
Apple	O
Macintosh	O
2	O
800	O
KB	O
High	O
512	O
18	O
80	O
2	O
1440	O
KB	O
300	O
MFM	B-Protocol
Atari	B-Device
8-bit	I-Device
5-inch	O
Single	O
128	O
18	O
40	O
1	O
90	O
KB	O
288	O
FM	B-Protocol
Third	O
party	O
drives	O
offer	O
up	O
to	O
1440	O
KB	O
.	O
</s>
<s>
Double	O
128	O
26	O
130	O
KB	O
MFM	B-Protocol
Double	O
256	O
18	O
180	O
KBDouble256182360	O
KB300	O
Atari	O
ST/TT/Falcon	O
3-inch	O
(	O
90	O
mm	O
)	O
Double	O
512	O
9	O
80	O
1	O
360	O
KB	O
300	O
MFM	B-Protocol
2	O
720	O
KB	O
High	O
18	O
1440	O
KB	O
Coleco	B-Device
ADAM	I-Device
5-inch	O
Double	O
512	O
8	O
40	O
1	O
160	O
KB	O
300	O
MFM	B-Protocol
Commodore	O
(	O
8-bit	O
)	O
5-inch	O
Double	O
256	O
Variable	O
(	O
17-21	O
)	O
ZCAV	B-Architecture
35	O
1	O
170	O
KB	O
300	O
GCR	B-Device
Commodore	O
floppy	B-Device
drives	I-Device
used	O
a	O
fixed	O
rotation	O
speed	O
with	O
variable	O
sector	O
density	O
(	O
see	O
:	O
Zone	B-Architecture
bit	I-Architecture
recording	I-Architecture
)	O
.	O
</s>
<s>
2	O
340	O
KB	O
Quad	O
Variable	O
(	O
23-29	O
)	O
ZCAV	B-Architecture
77	O
1	O
521	O
KB	O
2	O
1042	O
KB	O
3-inch	O
(	O
90	O
mm	O
)	O
Double	O
512	O
10	O
80	O
2	O
800	O
KB	O
MFM	B-Protocol
Commodore	B-Device
Amiga	I-Device
5-inch	O
Double	O
512	O
11	O
40	O
2	O
440	O
KBThis	O
format	O
was	O
used	O
by	O
the	O
Amiga	B-Device
1020	O
external	O
floppy	B-Device
drive	I-Device
and	O
some	O
third-party	O
drives	O
connected	O
to	O
the	O
normal	O
Amiga	B-Device
floppy	B-Device
drive	I-Device
bus	O
.	O
</s>
<s>
300	O
MFM	B-Protocol
Though	O
the	O
Amiga	B-Device
used	O
MFM	B-Protocol
,	O
the	O
format	O
places	O
sectors	O
too	O
close	O
together	O
for	O
a	O
standard	O
IBM	B-Device
PC	I-Device
compatible	O
floppy	B-Device
disk	I-Device
controller	O
to	O
read	O
(	O
appearing	O
as	O
one	O
5632-byte	O
physical	O
sector	O
per	O
track	O
)	O
.	O
</s>
<s>
3-inch	O
(	O
90	O
mm	O
)	O
Double	O
880	O
KB	O
High	O
19	O
1520	O
KB	O
GCR	B-Device
Format	I-Device
used	O
by	O
third-party	O
gcrdisk.device	O
driver	O
in	O
order	O
to	O
use	O
PC-standard	O
HD	O
floppy	B-Device
drives	I-Device
(	O
which	O
rotated	O
at	O
a	O
fixed	O
300	O
rpm	O
)	O
via	O
the	O
Amiga	B-Device
floppy	B-Device
drive	I-Device
bus	O
.	O
</s>
<s>
The	O
Amiga	B-Device
's	O
floppy	B-Device
controller	O
could	O
not	O
keep	O
up	O
with	O
the	O
data	O
rate	O
needed	O
for	O
MFM	B-Protocol
recording	O
on	O
HD	O
floppies	B-Device
without	O
reducing	O
rotational	O
speed	O
,	O
so	O
the	O
third	O
party	O
driver	O
used	O
an	O
alternate	O
GCR	B-Device
mode	O
.	O
</s>
<s>
22	O
1760	O
KB	O
150	O
MFM	B-Protocol
IBM	B-Device
3740	I-Device
8-inch	O
Single	O
128	O
26	O
73	O
1	O
237.25	O
KB	O
360	O
FM	B-Protocol
They	O
have	O
73	O
data	O
tracks	O
,	O
1	O
index	O
track	O
,	O
2	O
spare	O
tracks	O
,	O
1	O
reserved	O
track	O
.	O
</s>
<s>
DEC	O
RX50	O
5-inch	O
Quad	O
512	O
10	O
80	O
1	O
400	O
KB	O
300	O
MFM	B-Protocol
IBM	B-Device
PC	I-Device
compatibles	O
8-inch	O
Single	O
128	O
26	O
77	O
1	O
250.25	O
KBThe	O
calculated	O
formatted	O
capacity	O
is	O
based	O
on	O
FAT12	B-Application
format	O
.	O
</s>
<s>
360	O
FM	B-Protocol
While	O
IBM	O
did	O
n't	O
include	O
an	O
8-inch	B-Device
floppy	I-Device
drive	O
option	O
on	O
any	O
of	O
their	O
PCs	O
and	O
PC	B-Operating_System
DOS	I-Operating_System
,	O
MS-DOS	B-Application
1.25	O
supported	O
8-inch	O
disks	O
and	O
added	O
support	O
for	O
higher	O
capacities	O
in	O
version	O
2.0	O
.	O
</s>
<s>
MS-DOS	B-Application
'	O
predecessor	O
86-DOS	B-Operating_System
used	O
8-inch	O
diskettes	B-Device
as	O
well	O
.	O
</s>
<s>
2	O
500.5	O
KB	O
Double	O
1024	O
8	O
1	O
616	O
KBMFM	O
2	O
1232	O
KB	O
5-inch	O
Double	O
512	O
8	O
40	O
1	O
160	O
KB	O
300	O
MFM	B-Protocol
2	O
320	O
KB	O
9	O
1	O
180	O
KB	O
2	O
360	O
KB	O
QuadRare	O
format	O
appearing	O
on	O
some	O
early	O
PC/XT	O
clones	O
using	O
quad-density	O
disks	O
.	O
</s>
<s>
8	O
80	O
1	O
320	O
KB	O
300	O
2	O
640	O
KB	O
High	O
15	O
80	O
2	O
1200	O
KB	O
360	O
3-inch	O
(	O
90	O
mm	O
)	O
Double	O
512	O
8	O
80	O
1	O
320	O
KB	O
300	O
MFM	B-Protocol
9	O
360	O
KB	O
8	O
2	O
640	O
KB	O
9	O
720	O
KB	O
High	O
18	O
1440	O
KB	O
21	O
1680	O
KB	O
DMFThese	O
variations	O
are	O
known	O
as	O
DMF	B-Device
diskettes	B-Device
,	O
used	O
for	O
a	O
time	O
to	O
pack	O
more	O
data	O
on	O
to	O
each	O
disk	O
for	O
software	O
distribution	O
.	O
</s>
<s>
82	O
1720	O
KB	O
Extended	O
36	O
80	O
2880	O
KBPlatform	O
Size	O
Density	O
Bytes/	O
sector	O
Sectors/	O
track	O
Tracks/	O
side	O
Sides	O
Capacity	O
rpm	O
Encoding	O
Note	O
MGT	O
SAM	B-Device
Coupé	I-Device
3-inch	O
(	O
90	O
mm	O
)	O
Double	O
512	O
10	O
80	O
2	O
800	O
KB	O
300	O
MFM	B-Protocol
NEC	B-Operating_System
PC98	I-Operating_System
8-inch	O
Single	O
128	O
26	O
77	O
1	O
250.25	O
KB	O
360	O
FM	B-Protocol
Double	O
1024	O
8	O
77	O
2	O
1232	O
KB	O
MFM	B-Protocol
5-inch	O
Double	O
512	O
8	O
80	O
2	O
640	O
KB	O
360	O
MFM	B-Protocol
9	O
720	O
KB	O
High	O
15	O
1200	O
KB	O
1024	O
8	O
77	O
(	O
80	O
)	O
1232	O
(	O
1280	O
)	O
KBInner	O
3	O
tracks	O
of	O
8	O
sectors/track	O
format	O
are	O
unused	O
.	O
</s>
<s>
3-inch	O
(	O
90	O
mm	O
)	O
Double	O
512	O
8	O
80	O
2	O
640	O
KB	O
360	O
MFM	B-Protocol
9	O
720	O
KB	O
High	O
15	O
1200	O
KB	O
3-modeThe	O
PC98	B-Operating_System
3-inch	O
(	O
90	O
mm	O
)	O
formats	O
are	O
also	O
known	O
as	O
"	O
3	O
Mode	O
"	O
floppy	B-Device
disks	I-Device
,	O
usable	O
on	O
IBM	B-Device
PC	I-Device
compatibles	O
with	O
a	O
3-mode	O
floppy	B-Device
drive	I-Device
.	O
</s>
<s>
1024	O
8	O
77	O
(	O
80	O
)	O
1232	O
(	O
1280	O
)	O
KB	O
512	O
18	O
80	O
1440	O
KB	O
300	O
Triple	O
512	O
38	O
240	O
9120	O
KB	O
360	O
NEC	B-Device
PC-88	I-Device
VA3	I-Device
2TD	O
drive	O
only	O
Osborne	B-Device
1	I-Device
5-inch	O
Single	O
25610401	O
100	O
KB	O
300	O
FM	B-Protocol
Double	O
10245	O
200	O
KB	O
MFM	B-Protocol
Sega	O
SF-7000	O
3-inch	O
Single	O
256	O
16	O
40	O
2	O
160	O
KB	O
?	O
</s>
