{{Short description|None}} {{for|a more in-depth textual description of some of these formats|Floppy disk variants}} {{use mdy dates|date=October 2020}} thumb|8-inch, {{frac|5|1|4}}-inch, and {{frac|3|1|2}}-inch floppy disks
This is a list of different floppy disk formats.
==Physical formats== {| class="wikitable mw-collapsible" |+ !Size !! Density !Sides!! Tracks !! tpi !! bpi !Sectoring!! Coercivity !! Unformatted capacity per side |- |2 inch Video Floppy | | |52 |256 | | | |>800 kB or 50 fields of analog video<ref>{{Cite patent|number=US4609949A|title=Magnetic disc reproducing apparatus|gdate=1986-09-02|assign1=Sony Corporation|invent1=Kutaragi, Ken|url=https://patents.google.com/patent/US4609949A/en?oq=4609949}}</ref> |- |2 inch LT-1 |Double | |80 |245 | | | | |- | 2{{frac|1|2}} inch|| Single | || 16<ref name="Sharp_1986_CE1600F">{{cite book |url=http://sharppocketcomputers.com/4HK7JnFJDuVm/Service/ce1600f_service_manual.pdf |title=Sharp PC-1600 Service Manual |date=July 1986 |publisher=Sharp Corporation, Information Systems Group, Quality & Reliability Control Center |location=Yamatokoriyama, Japan |pages=98–104 |chapter=Model CE-1600F |access-date=2017-03-23 |archive-url=https://web.archive.org/web/20170323132153/http://sharppocketcomputers.com/4HK7JnFJDuVm/Service/ce1600f_service_manual.pdf |archive-date=2017-03-23 |url-status=live}}</ref><ref name="Sharp_1986_CE140F">{{cite book |url=http://pockemul.free.fr/Documents/ce-140f_Service_manual.pdf |title=Sharp Service Manual Model CE-140F Pocket Disk Drive |publisher=Sharp Corporation |id=00ZCE140F/SME |access-date=2017-03-11 |archive-url=https://web.archive.org/web/20170311145818/http://pockemul.free.fr/Documents/ce-140f_Service_manual.pdf |archive-date=2017-03-11 |url-status=live}}</ref>|| 48<ref name="Sharp_1986_CE1600F" /> || | || || 64 kB |- | 3 inch QuickDisk|| | || || || | || || |- | rowspan="2" |3.25 inch |Single | rowspan="2" |1 | rowspan="2" |80<ref>{{Cite book |url=https://twitter.com/Foone/status/1316017501621215233/photo/1 |title=Tabor TC-500 Specifications |publisher=Tabor Corp |location=USA |language=en |archive-url=https://web.archive.org/web/20220112061305/https://twitter.com/Foone/status/1316017501621215233/photo/1 |archive-date=12 Jan 2022}}</ref> | rowspan="2" |140 |4,625 | rowspan="2" | | rowspan="2" | |250 kB |- |Double |9,250 |500 kB |- | rowspan="5" | 3{{frac|1|2}} inch || Single | rowspan="5" |2|| 40<ref name="Epson_1984_PF10">{{cite web |url=http://electrickery.xs4all.nl/comp/px8/doc/PF-10Manual.pdf |title=PF-10 |author=<!--Not stated--> |date=1984 |publisher=Epson |access-date=November 30, 2022 |quote= |archive-url=https://web.archive.org/web/20200621102808/http://electrickery.xs4all.nl/comp/px8/doc/PF-10Manual.pdf |archive-date=June 21, 2020}}</ref> || 67.5 || 8,650 | rowspan="5" |Soft|| 665 Oe || 250 kB{{cn |date=November 2022}} |- |Double | 80 || 135 || 8,717 || 665 Oe<ref>{{Cite web |title=Floppy Drive Tech Info |url=http://www.retrotechnology.com/herbs_stuff/drive.html |access-date=2023-07-06 |website=www.retrotechnology.com}}</ref>|| 500 kB{{cn |date=November 2022}} |- | High ||80 || 135 || 17,434 || 720-750 Oe || 1 MB |- | Extended || 80 || 135 || 34,868 || rowspan="2" |900 Oe || 2 MB |- |Triple<ref name="NEC_72070">{{cite book |title=NEC μPD72070 - Floppy Disk Controller Specification Version 2.0 |version=2.0 preliminary |publisher=NEC Corporation |date=October 1991 |url=http://dec8.info/Apple/uPD72070.pdf |access-date=2017-03-20 |url-status=dead |archive-url=https://web.archive.org/web/20170320235834/http://dec8.info/Apple/uPD72070.pdf |archive-date=2017-03-20 }}</ref> || 240<ref name="NEC_PC88VA3">{{cite web |url=http://www.pc88.gr.jp/va/va-hard.html |archiveurl=https://web.archive.org/web/20170618120229/http://www.pc88.gr.jp/va/va-hard.html |archivedate=2017-06-18 |url-status=live |language=ja |website=NEC PC-88VA |trans-title=Hardware |title=ハードウエア}} </ref> || 406.5<ref name="NEC_PC88VA3"/> || 36,700<ref name="NEC_PC88VA3"/> ||6.5 MB<!-- NEC calls the controller a 13 MB FDD, other sources 12.5 MB (unformatted), 9.3 MB formatted. Since table column is for single side only, value needs to be halfed. --> |- |4 inch DemiDiskette | |1<ref>{{Cite patent|number=US4482929A|title=Magnetic recording disk cartridge|gdate=1984-11-13|invent1=Beck|invent2=Bornhorst|invent3=Smith|invent4=Zell|inventor1-first=John L.|inventor2-first=Randy J.|inventor3-first=Donald J.|inventor4-first=Michael N.|url=https://patents.google.com/patent/US4482929/en}}</ref> | | | | | | |- | rowspan="5" | 5{{frac|1|4}} inch || Single/Double | rowspan="5" |2|| 40 || 48 || 5,876 | rowspan="3" |Soft or hard|| 300 Oe || 250 kB |- | Quad || 77 || 100 || || 300 Oe || 500 kB (Micropolis-compatible) |- | Quad || 80 || 96 || 5,922 || 300 Oe || 500 kB |- | High || 80 || 96 || 9,646 | rowspan="2" |Soft|| 600 Oe || 833 kB |- |EH<ref>{{Cite web |date=1986 |title=Fujitsu Sales Prospector 1986 |url=https://archive.org/details/bitsavers_fujitsuFuj1986_53231193 |archive-url= |archive-date= |access-date=2023-11-07 |website=Archive.org |page=238}}</ref> |104 |125 |29,560 | |6.5 MB<ref>{{Cite web |date=1985-01-06 |title=コンピュータ・情報システム・パソコン・周辺機器 |trans-title=Hitachi Computer Peripherals |url=https://www.hitachihyoron.com/jp/pdf/1985/01/1985_01_06.pdf |access-date=2023-11-07 |website=hitachihyoron.com |page=9 }}</ref> |- |5{{frac|1|4}} inch Apple FileWare |Double |2 |80 |62.5 | |Soft | |851 kiB<ref>{{Cite book |last=Berry |first=D |url=http://www.bitsavers.org/pdf/apple/lisa/hardware/Lisa_Hardware_Manual_Sep82.pdf |title=Lisa Hardware Manual |date=7 September 1982 |publisher=Apple Computer Inc. |pages=9–1}}</ref> |- | rowspan="3" | 8 inch || Single | || rowspan="2" | 77 || rowspan="2" | 48 ||3,268-3,408 | rowspan="2" |Soft or hard (inner edge) | rowspan="2" | 300 Oe || 1 MB |- |Double | |6,816 |1 MB |- |HD<ref>{{Cite web |date=1986 |title=Fujitsu Sales Prospector 1986 |url=https://archive.org/details/bitsavers_fujitsuFuj1986_53231193 |via=Archive.org |pages=238,239}}</ref> | |154 |96 |20,560 | |600 Oe |9.6 MB<ref>{{Cite web |date=1984-08-03 |title=FDD-441大容量フロッピーディスク駆動装置の開発 |trans-title=Development of FDD-441 Large-Capacity Floppy Disk Drive |url=https://www.hitachihyoron.com/jp/pdf/1984/08/1984_08_03.pdf |access-date=2023-11-07 |website=hitachihyoron.com |page=3}}</ref> |- | rowspan="2" |8 inch Memorex FD |650 | rowspan="2" |1<ref name=":1">{{Cite book |url=http://archive.org/details/bitsavers_memorexdispyOEM_1669950 |title=650 Flexible Disc File OEM Manual 2944.010 |publisher=Memorex Corp |year=1972 |pages=9 |language=en}}</ref> |50<ref name=":1" /> | |2,400 | rowspan="2" |Hard (outer edge) | rowspan="2" | |1.5 Mb<ref name=":1" /> |- |651 |64<ref name=":2">{{Cite book |url=https://mrxhist.org/docs/Myle_5533.pdf |title=Memorex Markette Flexible Discs |publisher=Memorex Corp |year=1978 |location=USA |pages=1–2 |language=en}}</ref> | |3,100 |2.5 Mb<ref name=":2" /><ref name=":3">{{Cite book |url=http://archive.org/details/bitsavers_memorexdispyOEM_1644196 |title=Memorex 651 Flexible Disc File OEM Manual |publisher=Memorex Corp |year=1977 |location=USA |pages=4 |language=en}}</ref> |- |8 inch Burroughs |Double |2 |139 |150 |7,100 | | |2<ref name=":4" /> |}
== Logical formats == Throughout the 1970s and 1980s, many different logical disk formats were used, depending on the hardware platform.
{| class="wikitable sortable mw-collapsible" |+ Common floppy disk formats, logical characteristics by platform !Platform !! Size !! Density !! Sides !! Tracks/ side !! Sectors/ track !! Bytes/ sector !Sectoring!! Capacity !! rpm !! Encoding !! Note |- | rowspan="8" | Acorn | rowspan="5" | 5{{frac|1|4}} inch | rowspan="2" | Single | rowspan="2" | 1 | 40 | rowspan="2" | 10 | rowspan="2" | 256 | rowspan="8" |Soft | 100 kB | rowspan="5" | 300 | rowspan="2" | FM |- | 80 | 200 kB |- | rowspan="3" | Double | rowspan="2" | 1 | 40 | rowspan="3" | 16 | rowspan="3" | 256 | 160 kB | rowspan="3" | MFM |- | rowspan="2" | 80 | 320 kB |- | 2 | 640 kB |- | rowspan="3" | 3{{frac|1|2}} inch | rowspan="2" | Double | rowspan="3" | 2 | rowspan="3" | 80 | 16 | 256 | 640 kB | rowspan="3" | 300 | rowspan="3" | MFM | Format L: MOS (Electron, Master Compact) |- | 5 | rowspan="2" | 1024 | 800 kB | {{ubl|Format D: Arthur, RISC iX|Format E: RISC OS}} |- | High | 10 | 1,600 kB | Format F: RISC OS 3 and later. Archimedes models before the A5000 require an upgraded floppy drive. |- | Agat | 5{{frac|1|4}} inch | Double | 2 | 80 | 21 | 256 | | 840 kB | 300 | MFM | <ref group="NB">Custom controller with unique track layout.[https://github.com/sintech/AGAT/blob/master/docs/agat-840k-format.txt]</ref> |- | rowspan="5" | Amiga | rowspan="2" | 5{{frac|1|4}} inch | Double | rowspan="5" | 2 | 40 | rowspan="3" | 11 | rowspan="5" | 512 | rowspan="5" | Soft | 440 kB<ref group="NB">This format was used by the Amiga 1020 external floppy drive and some third-party drives connected to the normal Amiga floppy drive bus.</ref> | rowspan="4" | 300 | rowspan="3" | MFM | rowspan="3" | <ref group="NB" name="amigamfm">Though the Amiga used MFM, the format places sectors too close together for a standard IBM PC compatible floppy disk controller to read (appearing as one 5632-byte physical sector per track).</ref> |- | Quad | rowspan="4" | 80 | 880 kB<ref group="NB">Format used by rare third-party drives with quad density disks; such drives were usually switchable between 80-track and 40-track (A1520/PC-compatible) operation.</ref> |- | rowspan="3" | 3{{frac|1|2}} inch | Double | 880 kB |- | rowspan="2" | High | 19 | 1,520 kB | GCR | <ref group="NB">Format used by third-party [http://aminet.net/package/docs/hard/drv-1.44 gcrdisk.device] driver in order to use PC-standard HD floppy drives (which rotated at a fixed 300 rpm) via the Amiga floppy drive bus. The Amiga's floppy controller could not keep up with the data rate needed for MFM recording on HD floppies without reducing rotational speed, so the third party driver used an alternate GCR mode.</ref> |- | 22 | 1,760 kB | 150 | MFM | <ref group="NB" name="amigamfm"/> |- | Amstrad CPC/PCW | 3 inch | Double | 1 | 40 | 9 | 512 | | 180 kB | 300 | MFM | Single head drive, but double-sided floppy discs (total of 360 kB per floppy) |- | Amstrad PCW8512/9512 | 3 inch | Double | 2 | 80 | 9 | 512 | | 720 kB | 300 | MFM | 720 kB mode uses both sides - ensure disc inserted correct way up. |- | rowspan="5" | Apple II | rowspan="2" | 5{{frac|1|4}} inch | rowspan="2" | Double | 1 | rowspan="2" | 35 | 13 | rowspan="2" | 256 | rowspan="5" | Soft | 113.75 kB | rowspan="2" | 300 | rowspan="2" | GCR | rowspan="2" | <ref group="NB">16 sector filesystems require a compatible disk controller (PROM update) and Apple DOS 3.3 or later.</ref> |- | 1 | 16 | 140 kB |- | rowspan="3" | 3{{frac|1|2}} inch | rowspan="2" | Double | 1 | rowspan="2" | 80 | rowspan="2" | Variable (8-12) | rowspan="2" | 512 | 400 kB | rowspan="2" | 394 - 590 | rowspan="2" | GCR | rowspan="2" | <ref group="NB">Apple II double-density 3{{frac|1|2}}-inch (90 mm) drives use variable sectors sizes (tracks 00-15: 12 sectors, tracks 16-31: 11 sectors, tracks 32-47: 10 sectors, tracks 48-63: 9 sectors, tracks 64-79: 8 sectors), 394 rpm to 590 rpm. [https://support.apple.com/kb/TA39910?locale=en_US&viewlocale=en_US]</ref> |- | 2 | 800 kB |- | High | 2 | 80 | 18 | 512 | 1,440 kB | 300 | MFM | <ref group="NB">Apple II high-density 3{{frac|1|2}}-inch (90 mm) drives require a compatible disk controller and ProDOS 8.</ref> |- | Apple Lisa | 5{{frac|1|4}} inch FileWare | Double | 2 | 46 | Variable (15-22) | 512 |Soft | 851 kB<!-- The actual capacity of the drive is 851 sectors per side (per the Lisa Hardware Manual), or 871,424 bytes, since most of the table is using 1024 byte "kb", I've changed this to 851. --> | 218 - 320<ref>{{Cite web |title=Apple's Twiggy Disks |url=http://www.brouhaha.com/~eric/retrocomputing/lisa/twiggy.html |access-date=2023-10-11 |website=www.brouhaha.com}}</ref> | GCR | |- | Apple Lisa 2/Macintosh XL, Macintosh | rowspan="3" | 3{{frac|1|2}} inch | rowspan="2" | Double | 1 | rowspan="2" | 80 | rowspan="2" | Variable (8-12) | rowspan="2" | 512 | rowspan="3" | Soft | 400 kB | rowspan="2" | 394 - 590 | rowspan="2" | GCR | |- | rowspan="2" | Macintosh | 2 | 800 kB | rowspan="2" | |- | High | 2 | 80 | 18 | 512 | 1,440 kB | 300 | MFM |- | rowspan="4" | Atari 8-bit | rowspan="4" | 5{{frac|1|4}} inch | Single | rowspan="3" | 1 | rowspan="4" | 40 | 18 | 128 | rowspan="4" | Soft | 90 kB | rowspan="3" | 288 | FM | rowspan="4" | <ref group="NB">Third party drives offer up to 1440 KB.</ref> |- | Dual | 26 | 128 | 130 kB | rowspan="3" | MFM |- | Double | 18 | 256 | 180 kB |- |Double |2 |18 |256 |360 kB |300 |- | rowspan="3" | Atari ST/TT/Falcon | rowspan="3" | 3{{frac|1|2}} inch | rowspan="2" | Double | rowspan="1" | 1 | rowspan="3" | 80 | rowspan="2" | 9 | rowspan="3" | 512 | rowspan="3" | Soft | 360 kB | rowspan="3" | 300 | rowspan="3" | MFM |- | rowspan="2" | 2 | 720 kB |- | High | 18 | 1,440 kB |- |Burroughs MD122 |8 inch |Double |2 |139 |44 |256 |Soft |6.26 MB<ref name=":4">{{Cite book |url=http://archive.org/details/bitsavers_burroughsD003MD122BrochureNov1979_1775811 |title=Burroughs MD 122 Brochure |publisher=Burroughs Marketing |year=1979 |location=USA |pages=2 |language=en}}</ref> |524 |MFM | |- | Coleco ADAM | 5{{frac|1|4}} inch | Double | 1 | 40 | 8 | 512 |soft | 160 kB | 300 | MFM |- | rowspan="5" | Commodore 64 (8-bit) | rowspan="4" | 5{{frac|1|4}} inch | rowspan="2" | Double | 1 | rowspan="2" | 35 | rowspan="2" | Variable (17-21) ZCAV | rowspan="4" | 256 | rowspan="5" | Soft | 170 kB | rowspan="5" | 300 | rowspan="4" | GCR | rowspan="4" | <ref group="NB">Commodore floppy drives used a fixed rotation speed with variable sector density (see: Zone bit recording).</ref> |- | 2 | 340 kB |- | rowspan="2" | Quad | 1 | rowspan="2" | 77 | rowspan="2" | Variable (23-29) ZCAV | 521 kB |- | 2 | 1,042 kB |- | 3{{frac|1|2}} inch | Double | 2 | 80 | 10 | 512 | 800 kB | MFM | |- |rowspan="4" | Commodore 128 (CP/M) |rowspan="4" | 5 1/4 |rowspan="4" |Double |rowspan="4" |2 |rowspan="4" |40 |26 |128 |rowspan="4" |Soft |260K |rowspan="4" |300 |rowspan="4" |MFM |rowspan="4" |Commodore 1571 <ref name="Commodore1571">{{cite web |url=https://www.c64-wiki.com/wiki/Commodore_1571 |title=Commodore 1571 |access-date=2026-03-10 |version=1.0}}</ref> |- |16 |256 |320K |- |9 |512 |360K |- |5 |1,024 |400K |- |Commodore 900 |5{{frac|1|4}} inch |High |2 |80 |13-16 |512 |Soft |1,200kB |? |GCR |<ref name="C900">{{cite web |url=https://vintagecomputer.ca/files/Commodore/C900/C900%20Floppy%20Specification.pdf |title=Commodore 900 Floppy Specification | first1=Benny | last1=Purden | first2=Frank | last2=Hughes | date=1985-03-15 |access-date=2026-03-10 |version=1.0}}</ref> |- |DEC RX01 |8 inch |Single |1 |77 |26 |128 | |250 kB |360 |FM | |- |DEC RX02 |8 inch |Double |1 |77 |26 |256 | |500 kB |360 |FM/MFM | |- | DEC RX50 | 5{{frac|1|4}} inch | Quad | 1 | 80 | 10 | 512 | | 400 kB | 300 | MFM |- |HP 110 |3{{frac|1|2}} inch |Double |2 |76 |9 |512 | |710kB<ref>{{Cite book |url=http://www.bitsavers.org/pdf/hp/disc/5957-6657_9914A_Disc_Drive_Jun84.pdf |title=9914A Disc Drive |publisher=Hewlett-Packard |publication-date=1 June 1984 |page=1-2 |language=en}}</ref> |600 |MFM |HP 9114A |- |HP 80 9800 1000 and 3000 |8 inch |Double |2 |77 |30 |256 | |1.18 MB<ref>{{Cite book |url=http://www.bitsavers.org/pdf/hp/disc/09895-90000_9895A_Flexible_Disc_Users_Man_Sep79.pdf |title=9895A Flexible Disc Users Manual |publisher=Hewlett-Packard Desktop Computer Division |year=1978 |location=Fort Collins, Colorado USA |pages=6 |language=en}}</ref> |360 |MFM |HP 9895A |- |HP 86 |5{{frac|1|4}} inch |Double |2 |35 |16 |256 | |280 kB<ref>{{Cite book |url=http://www.bitsavers.org/pdf/hp/disc/09130-90030_9130K_Service_Jul81.pdf |title=HP 9130K Flexible Disc Drive Service Documentation |publisher=Hewlett-Packard Greeley Division |year=1981 |location=Fort Collins, Colorado USA |language=en}}</ref> |300 |MFM |HP 9130K |- | rowspan="3" |IBM 33FD | rowspan="8" |8 inch | rowspan="5" |Single | rowspan="3" |1 | rowspan="8" |77 |26 |128 | |240.5 kiB | rowspan="8" |360 | rowspan="5" |FM | rowspan="3" |Diskette 1<ref name=":0">{{Cite book |url=http://bitsavers.trailing-edge.com/pdf/ibm/floppy/GA21-9182-4_Diskette_General_Information_Manual_Aug79.pdf |title=The IBM Diskette General Information Manual |publisher=IBM |year=1979 |location=USA |pages=18–19 |type=Reference Manual}}</ref> |- |15 |256 | |277.5 kiB |- |8 |512 | |296 kiB |- | rowspan="2" |IBM 43FD | rowspan="5" |2 |26 |128 | |481 kiB | rowspan="2" |Diskette 2<ref name=":0" /> |- |15 |256 | |555 kiB |- id="IBM 53FD" | rowspan="3" |IBM 53FD | rowspan="3" |Double |26 |256 | |962 kiB | rowspan="3" |MFM | rowspan="3" |Diskette 2D<ref name=":0" /> |- |15 |512 | |1.08 MiB |- |8 |1,024 | |1.16 MiB |- | rowspan="19" | IBM PC compatibles<ref name="KB75131" /> | rowspan="4" | 8 inch | rowspan="2" | Single | 1 | rowspan="4" | 77 | rowspan="2" | 26 | rowspan="2" | 128 | rowspan="19" | Soft | 250.25 kB<ref group="NB" name="fat12">The calculated formatted capacity is based on FAT12 format.</ref><ref name="KB75131">{{cite web |url=https://jeffpar.github.io/kbarchive/kb/075/Q75131/ |title=Standard Floppy Disk Formats Supported by MS-DOS |publisher=Microsoft |date=2000-12-17 |access-date=2020-02-05 |version=2.0}}</ref><ref name="Duncan_1988_MS-DOS_Encyclopedia" /><ref name="Xerox_1983_168">{{cite book |publisher=Xerox |date=November 1983 |title=Xerox 16/8 Professional Computer – MS-DOS OS Handbook for 8" Floppy Disks |url=http://bitsavers.trailing-edge.com/pdf/xerox/820-II/610P72377_MS-DOS_OS_Handbook_for_8_Inch_Floppy_Disks_Nov83.pdf}}</ref> | rowspan="4" | 360 | rowspan="2" | FM | rowspan="4" | <ref group="NB">While IBM didn't include an 8-inch floppy drive option on any of their PCs and PC DOS, MS-DOS 1.25 supported 8-inch disks and added support for higher capacities in version 2.0. MS-DOS' predecessor 86-DOS used 8-inch diskettes as well.</ref> |- | 2 | 500.5 kB<ref group="NB" name="fat12"/><ref name="KB75131"/><ref name="Duncan_1988_MS-DOS_Encyclopedia"/><ref name="Xerox_1983_168"/> |- | rowspan="2" | Double | 1 | rowspan="2" | 8 | rowspan="2" | 1,024 | 616 kB<ref group="NB" name="fat12"/><ref name="Duncan_1988_MS-DOS_Encyclopedia"/><ref name="Xerox_1983_168"/> | rowspan="2" |MFM |- | 2 | 1,232 kB<ref group="NB" name="fat12"/><ref name="KB75131"/><ref name="Duncan_1988_MS-DOS_Encyclopedia"/><ref name="Xerox_1983_168"/> |- | rowspan="7" | 5{{frac|1|4}} inch | rowspan="4" | Double | 1 | rowspan="4" | 40 | rowspan="2" | 8 | rowspan="7" | 512 | 160 kB<ref group="NB" name="fat12"/> | rowspan="4" | 300 | rowspan="7" | MFM | rowspan="7" | |- | 2 | 320 kB<ref group="NB" name="fat12"/> |- | 1 | rowspan="2" | 9 | 180 kB<ref group="NB" name="fat12"/> |- | 2 | 360 kB<ref group="NB" name="fat12"/> |- | rowspan="2" | Quad<ref group="NB">Rare format appearing on some early PC/XT clones using quad-density disks.</ref> | 1 | rowspan="2" | 80 | rowspan="2" | 8 | 320 kB<ref group="NB" name="fat12"/> |rowspan="2" | 300 |- | 2 | 640 kB<ref group="NB" name="fat12"/> |- | High | 2 | 80 | 15 | 1,200 kB<ref group="NB" name="fat12"/> | 360 |- | rowspan="8" | 3{{frac|1|2}} inch | rowspan="4" | Double | rowspan="2" | 1 | rowspan="6" | 80 | 8 | rowspan="8" | 512 | 320 kB<ref group="NB" name="fat12"/> | rowspan="8" | 300 | rowspan="8" | MFM |- | 9 | 360 kB<ref group="NB" name="fat12"/> |- | rowspan="6" | 2 | 8 | 640 kB<ref group="NB" name="fat12"/> |- | 9 | 720 kB<ref group="NB" name="fat12"/> |- | rowspan="3" | High | 18 | 1,440 kB<ref group="NB" name="fat12"/> |- | rowspan="2" | 21 | 1,680 kB<ref group="NB" name="fat12"/> | rowspan="2" | DMF<ref group="NB">These variations are known as DMF diskettes, used for a time to pack more data on to each disk for software distribution.</ref> |- | 82 | 1,720 kB<ref group="NB" name="fat12"/> |- | Extended | 80 | 36 | 2,880 kB<ref group="NB" name="fat12"/> |- |Memorex 650 | rowspan="2" |8 inch |Single | rowspan="2" |1 |50 |8 |3,500 b | rowspan="2" |Hard |1.4 Mb<ref name=":1" /> | rowspan="2" |375 | rowspan="2" |FM | |- |Memorex 651 |Single |64 |32 |1.056 b |2.2 Mb<ref name=":3" /> | |- | MGT SAM Coupé | 3{{frac|1|2}} inch | Double | 2 | 80 | 10 | 512 | | 800 kB | 300 | MFM | |- | rowspan="12" | NEC PC-98 | rowspan="2" | 8 inch | Single | 1 | 77 | 26 | 128 | | 250.25 kB<ref group="NB" name="fat12"/> | rowspan="2" | 360 | FM | rowspan="2" | |- | Double | 2 | 77 | 8 | 1,024 | | 1,232 kB<ref group="NB" name="fat12"/> | MFM |- | rowspan="4" | 5{{frac|1|4}} inch | rowspan="2" | Double | rowspan="4" | 2 | rowspan="3" | 80 | 8 | rowspan="3" | 512 | | 640 kB<ref group="NB" name="fat12"/> | rowspan="4" | 360 | rowspan="4" | MFM |- | 9 | | 720 kB<ref group="NB" name="fat12"/> | |- | rowspan="2" | High | 15 | | 1,200 kB<ref group="NB" name="fat12"/> |- | 77 (80)<ref group="NB" name="77_80_tracks" /> | 8 | 1,024 | |1,232 (1,280) kB<ref group="NB" name="fat12"/><ref group="NB" name="77_80_tracks"/> |<ref group="NB" name="77_80_tracks">Inner 3 tracks of 8 sectors/track format are unused.</ref> |- | rowspan="6" | 3{{frac|1|2}} inch | rowspan="2" | Double | rowspan="6" | 2 | rowspan="3" | 80 | 8 | rowspan="3" | 512 | | 640 kB<ref group="NB" name="fat12"/> | rowspan="4" | 360 | rowspan="6" | MFM |- | 9 | | 720 kB<ref group="NB" name="fat12"/> |- | rowspan="3" | High | 15 | | 1,200 kB<ref group="NB" name="fat12"/> | rowspan="2" | 3-mode<ref group="NB">The PC98 3{{frac|1|2}}-inch (90 mm) formats are also known as "3 Mode" floppy disks, usable on IBM PC compatibles with a 3-mode floppy drive.</ref><ref group="NB" name="77_80_tracks"/> |- | 77 (80)<ref group="NB" name="77_80_tracks" /> | 8 | 1,024 | | 1,232 (1,280) kB<ref group="NB" name="fat12"/><ref group="NB" name="77_80_tracks"/> |- | 80 | 18 | 512 | | 1.44 MB<ref group="NB" name="fat12"/> | 300 |- | Triple | 240 | 38 | 512 | | 9,120 kB<!-- calculated --> | 360 | NEC PC-88 VA3 2TD drive only<ref name="NEC_PC88VA3"/><ref name="NEC_72070"/> |- |rowspan=2| Osborne 1<ref>{{cite book |last1=Hogan |first1=Thom |url=http://www.bitsavers.org/pdf/osborne/osborne1/2F00153-01_Osborne1TechnicalManual_1982.pdf |title=Osborne 1 Technical Manual |last2=Iannamico |first2=Mike |date=1982 |publisher=Osborne Computer Corporation |page=39}}</ref> |rowspan=2| 5{{frac|1|4}} inch | Single | rowspan="2" |1 | rowspan="2" |40 |10 | 256 | rowspan="2" |Soft | 100 kB |rowspan=2| 300 | FM |- | Double |5 | 1,024 | 200 kB | MFM |- | Sega SF-7000 | 3 inch | Single | 2 | 40 | 16 | 256 | | 160 kB | ? | ? | Expansion unit for SC-3000 home computer. Capacity is per side. <ref>{{cite web | url=https://archive.org/stream/sega-sf-7000-super-control-station/sega-sf-7000-super-control-station_djvu.txt | title=Sega SF-7000 Super Control Station User Guide | publisher=Sega Enterprises | accessdate=2020-02-10}}</ref> |- | rowspan=2 | SHARP X68000 | 5{{frac|1|4}} inch | rowspan="2" | High | rowspan="2" | 2 | rowspan="2" | 77 | rowspan="2" | 8 | rowspan="2" | 1,024 | | rowspan="2" | 1,232 kB<ref group="NB" name="fat12"/> | rowspan="2" | 360 | rowspan="2" | MFM | rowspan="2" | |- | 3{{frac|1|2}} inch | |- | SHARP CE-1600F, CE-140F | 2{{frac|1|2}} inch<ref name="Sharp_1986_CE1600F"/><ref name="Sharp_1986_CE140F"/> | Single | drive: 1, diskette: 2 (flippable) | 16 | 8 | 512 | | 2× 64 kB | 270 | GCR (4/5) | Internally based on FDU-250 Micro Floppy Disk Drive Unit<ref name="Sharp_1986_CE1600F"/> |- | rowspan="7" |Tandy TRS-80 |5{{frac|1|4}} inch |Single |1 |35 |10 |256 | rowspan="7" |Soft |88 kB | rowspan="7" |300 |FM |Model 1/3/4 |- |5{{frac|1|4}} inch |Double |1 |40 |18 |256 |180 kB |MFM |Model 1/3/4P |- |5{{frac|1|4}} inch |Double |2 |40 |18 |256 |360 kB |MFM |Model 4D |- |8 inch |Double |1 |77 |26 |256 |500 kB |MFM |Model 2 |- |3{{frac|1|2}} inch |Single |1 |40 |2 |1,280 |100 kB<ref>{{Cite book |last= |url=https://archive.org/details/TandyPortableDiskDriveOperationManual26-3808/page/n27 |title=Tandy Portable Disk Drive Operation Manual 26-3808 |publisher=Radio Shack |year=1985 |location=Japan |pages=25}}</ref> |FM |Tandy Portable Disk Drive (aka Brother FB-100, knitking FD-19) |- |3{{frac|1|2}} inch |Single |1 |80 |2 |1,280 |200 kB<ref>{{Cite book |url=http://archive.org/details/Portable_Disk_Drive_2_Operation_Manual_1986_Tandy |title=Tandy Portable Disk Drive 2 Operation Manual 26-3814 |publisher=Radio Shack |year=1986 |location=Japan |pages=33}}</ref> |FM |Used only in Tandy Portable Disk Drive 2 |- |5{{frac|1|4}} inch |Double |1 |35 |18 |256 |157 kB<ref>{{Cite book |url=http://archive.org/details/Color_Computer_Disk_System_Owners_Manual_1981_Tandy |title=Radio Shack Hardware Manual: Color Computer Disk System Owners Manual (1981)(Tandy) |date=1981}}</ref> |MFM |Color Computer |- | rowspan="4" | Thomson | rowspan="2" | 5{{frac|1|4}} inch | Single | 1 | rowspan="2" | 40 | rowspan="2" | 16 | 128 | | 80 kB | rowspan="2" | 300 | FM | Thomson UD90.070 |- | Double | 2 | 256 | | 320 kB | MFM | Thomson DD90-320<ref group="NB">The two sides are managed as two independent 160 KB disks</ref> |- | rowspan="2" | 3{{frac|1|2}} inch | Double | 1 | rowspan="2" | 80 | rowspan="2" | 16 | rowspan="2" | 256 | | 320 kB | rowspan="2" | 300 | rowspan="2" | MFM | Thomson TO9, Thomson DD09-350 |- | rowspan="1" | Double | 2 | | 640 kB | Thomson TO8D, TO9+, Thomson DD90-352<ref group="NB">The two sides are managed as two independent 320 KB disks</ref> |- | rowspan="2" | Victor 9000 / ACT Sirius 1<ref name="victormanual">{{cite web|url=http://bitsavers.org/pdf/victor/victor9000/Victor_9000_Hardware_Reference_Manual_1983.pdf |title=Victor 9000 Hardware Reference Manual |access-date=2022-09-12 | archive-url=https://web.archive.org/web/20220129140512/http://bitsavers.org/pdf/victor/victor9000/Victor_9000_Hardware_Reference_Manual_1983.pdf | archive-date=2022-01-29 |url-status=live}}</ref> | rowspan="2" |5{{frac|1|4}} inch |Single |1 | rowspan="2" |80 | rowspan="2" |11-19 (variable) |512 | |612 kB<ref name="lemmons198211">{{cite news |url=https://archive.org/stream/byte-magazine-1982-11/1982_11_BYTE_07-11_Graphics#page/n241/mode/2up |title=Victor Victorious |work=BYTE |date=November 1982 |access-date=2013-10-19 |author-last=Lemmons |author-first=Phil |page=216}}</ref> | rowspan="2" |252-417 (variable) | rowspan="2" |GCR | rowspan="2" |Disks varied sectors/track and disk speed to keep consistent bit density across tracks<ref name="victormanual" /> |- |Double |2 |512 | |1,196 kB<ref name="lemmons198211" /> |- | Vtech Laser210/VZ200 | 5{{frac|1|4}} inch | Single | ? | 40 | 16 | ? | Soft | 78 kB | ? | FM | RPM: 75. |} {| class="wikitable" |+ !Platform !Size !Density !Side !Track !Sector !Byte !Sectoring !Capacity !RPM !Encoding !Note |- |IBM PC Compatible |5 1/4 |Quad |2 |80 |31 |512 |Soft |2.5MB |300 |MFM |Rana 2000 with Rana controller card |}
==See also== * Zip drive (floppy-like, but incompatible medium using different technology) * PocketZip (floppy-like, but incompatible medium using different technology) * SuperDisk (floppy-like with drives also compatible with 3.5" floppy disks) * Magneto-optical drive (floppy-like, but incompatible medium using different technology) * List_of_Ecma_standards (ECMA standards 54, 59, 66, 69, 70, 78, 99, 100, 125 and 147)
==Notes== {{reflist|group="NB"}} {{notelist}}
==References== <references> <ref name="Duncan_1988_MS-DOS_Encyclopedia">{{Cite book |author-last1=Duncan |author-first1=Ray |title=The MS-DOS Encyclopedia: versions 1.0 through 3.2 |author-last2=Bostwick |author-first2=Steve |author-last3=Burgoyne |author-first3=Keith |author-last4=Byers |author-first4=Robert A. |author-last5=Hogan |author-first5=Thom |author-last6=Kyle |author-first6=Jim |author-last7=Letwin |author-first7=Gordon |author-link7=Gordon Letwin |author-last8=Petzold |author-first8=Charles |author-link8=Charles Petzold |author-last9=Rabinowitz |author-first9=Chip |date=1988 |publisher=Microsoft Press |isbn=1-55615-049-0 |edition=Completely reworked |location=Redmond, Washington, USA |contribution=Technical advisors |lccn=87-21452 |oclc=16581341 |author-first10=Jim |author-last10=Tomlin |author-first11=Richard |author-last11=Wilton |author-first12=Van |author-last12=Wolverton |author-first13=William |author-last13=Wong |author-first14=JoAnne |author-last14=Woodcock |contributor-first1=Mark |contributor-last1=Zbikowski |contributor-link1=Mark Zbikowski |contributor-first2=Paul |contributor-last2=Allen |contributor-link2=Paul Allen |contributor-first3=Steve |contributor-last3=Ballmer |contributor-link3=Steve Ballmer |contributor-first4=Reuben |contributor-last4=Borman |contributor-first5=Rob |contributor-last5=Borman |contributor-first6=John |contributor-last6=Butler |contributor-first7=Chuck |contributor-last7=Carroll |contributor-first8=Mark |contributor-last8=Chamberlain |contributor-first9=David |contributor-last9=Chell |contributor-first10=Mike |contributor-last10=Colee |contributor-first11=Mike |contributor-last11=Courtney |contributor-first12=Mike |contributor-last12=Dryfoos |contributor-first13=Rachel |contributor-last13=Duncan |contributor-first14=Kurt |contributor-last14=Eckhardt |contributor-first15=Eric |contributor-last15=Evans |contributor-first16=Rick |contributor-last16=Farmer |contributor-first17=Bill |contributor-last17=Gates |contributor-link17=Bill Gates |contributor-first18=Michael |contributor-last18=Geary |contributor-first19=Bob |contributor-last19=Griffin |contributor-first20=Doug |contributor-last20=Hogarth |contributor-first21=James W. |contributor-last21=Johnson |contributor-first22=Kaamel |contributor-last22=Kermaani |contributor-first23=Adrian |contributor-last23=King |contributor-first24=Reed |contributor-last24=Koch |contributor-first25=James |contributor-last25=Landowski |contributor-first26=Chris |contributor-last26=Larson |contributor-first27=Thomas |contributor-last27=Lennon |contributor-first28=Dan |contributor-last28=Lipkie |contributor-first29=Marc |contributor-last29=McDonald |contributor-link29=Marc McDonald |contributor-first30=Bruce |contributor-last30=McKinney |contributor-first31=Pascal |contributor-last31=Martin |contributor-first32=Estelle |contributor-last32=Mathers |contributor-first33=Bob |contributor-last33=Matthews <!-- |contributor-link33=Robert Matthews (scientist)??? --> |contributor-first34=David |contributor-last34=Melin |contributor-first35=Charles |contributor-last35=Mergentime |contributor-first36=Randy |contributor-last36=Nevin |contributor-first37=Dan |contributor-last37=Newell |contributor-first38=Tani |contributor-last38=Newell |contributor-first39=David |contributor-last39=Norris |contributor-first40=Mike |contributor-last40=O'Leary |contributor-first41=Bob |contributor-last41=O'Rear |contributor-link41=Bob O'Rear |contributor-first42=Mike |contributor-last42=Olsson |contributor-first43=Larry |contributor-last43=Osterman |contributor-first44=Ridge |contributor-last44=Ostling |contributor-first45=Sunil |contributor-last45=Pai |contributor-first46=Tim |contributor-last46=Paterson |contributor-link46=Tim Paterson |contributor-first47=Gary |contributor-last47=Perez |contributor-first48=Chris |contributor-last48=Peters |contributor-first49=Charles |contributor-last49=Petzold |contributor-link49=Charles Petzold |contributor-first50=John |contributor-last50=Pollock |contributor-first51=Aaron |contributor-last51=Reynolds |contributor-link51=Aaron R. Reynolds |contributor-first52=Darryl |contributor-last52=Rubin |contributor-first53=Ralph |contributor-last53=Ryan |contributor-first54=Karl |contributor-last54=Schulmeisters |contributor-first55=Rajen |contributor-last55=Shah |contributor-first56=Barry |contributor-last56=Shaw |contributor-first57=Anthony |contributor-last57=Short |contributor-first58=Ben |contributor-last58=Slivka |contributor-first59=Jon |contributor-last59=Smirl |contributor-first60=Betty |contributor-last60=Stillmaker |contributor-first61=John |contributor-last61=Stoddard |contributor-first62=Dennis |contributor-last62=Tillman |contributor-first63=Greg |contributor-last63=Whitten |contributor-first64=Natalie |contributor-last64=Yount |contributor-first65=Steve |contributor-last65=Zeck}} (xix+1570 pages; 26 cm) (NB. This edition was published in 1988 after extensive rework of the withdrawn 1986 first edition by a different team of authors. [https://www.pcjs.org/pubs/pc/reference/microsoft/mspl13/msdos/encyclopedia/])</ref> </references> * {{cite book |title=The IBM Diskette General Information Manual |url=http://bitsavers.trailing-edge.com/pdf/ibm/floppy/GA21-9182-4_Diskette_General_Information_Manual_Aug79.pdf |edition=Fifth |series=Product Reference Literature |date=August 1979 |publisher=IBM}} * {{cite web |title=RX02 8 inch Floppy Drive Information |url=http://www.pdp8online.com/rx02/rx02.shtml?med |publisher=David Gesswein |access-date=2007-09-21}} * {{cite web|title=8 inch floppy disks|url=https://ub.fnwi.uva.nl/computermuseum/diskettes.php|url-status=live|publisher=University of Amsterdam|archive-url=https://web.archive.org/web/20160702204635/https://ub.fnwi.uva.nl/computermuseum/diskettes.php|archive-date=July 2, 2016|access-date=2015-04-19}}
==External links== *{{commons-inline|Floppy disk}} * [https://obsoletemedia.org/data/disk/#fd Floppy Disk Formats] at the Museum of Obsolete Media
Category:Legacy hardware Category:Floppy disk computer storage