5.25  inch.  Floppy  Disks  

PDA  2015  

Peter  Chan  Digital  Archivist  April,  2015  

Filesystem  

•  A  filesystem  is  the  methods  and  data  structures  that  an  opera@ng  system  uses  to  keep  track  of  files  on  a  disk  or  par@@on;  that  is,  the  way  the  files  are  organized  on  the  disk.  -­‐  hGp://www.tldp.org/LDP/sag/html/filesystems.html  

•  A  drive  formaGed  by  a  Mac  cannot  be  read  using  a  PC.  

Apple  II  

Atari  810  

CPM  

IBM  PC  DOS  

Unknown  with  Hints  

Unknown  

File%System% Motherboard%

with%iTE%

IT8720%chip%

/%FTK%Imager%

($109)!

Modern%

Mac%/%

Command%

line%FTK%

for%Mac%

FC5025%

($55.25)%

KryoFlux%

($4,000)%

%

Amiga DiskSpare! ! ! ! Y!Amiga DOS (ADF)! ! ! ! Y!Apple DOS 3.2 (13-sector) 113 kb! ! ! Y! Y!Apple DOS 3.3 (16-sector) 130 kb! ! ! Y! Y!Apple!DOS!400K/800K!(ProDOS)! ! ! Y! Y!Apple HFS 800K ! Y! ! !Atari 810 130 kB?! ! ! Y! !Atari 8-bit (XFD, both FM and MFM) 90 kB!

! ! ! Y!

Calcomp Vistagraphics 4500! ! ! Y! !CBM!(!MicroProse,!!RapidLok,!!Datasoft,!!Vorpal,!VCMAX!,!!Teque,!!TDP,!!Big!Five,!!OziSoft)!

! ! ! Y!

CBM!DOS!(D64,!with!optional!error!map)! ! ! ! Y!CBM!GCR!image!(G64)! ! ! ! Y!Commodore 1541! ! ! Y! !CT Raw! ! ! ! Y!DEC!RX01! ! ! ! Y!DEC!RX02! ! ! ! Y!Emu! ! ! ! Y!Emu!II! ! ! ! Y!Generic FM! ! ! ! Y!Generic MFM (IMA, IMG)! ! ! ! Y!Kaypro 2 CP/M 2.2! ! ! Y! !Kaypro 4 CP/M 2.2! ! ! Y! !KryoFlux stream files! ! ! ! Y!Motorola VersaDOS! ! ! Y! !MS-DOS/ IBM PC DOS (160 KB, 360kB, 1.2 MB)!

Y! ! Y! !

North Star MDS-A-D! ! ! Y! !PMC MicroMate! ! ! Y! !Tandy Color Computer Disk BASIC! ! ! Y! !TI-99/4A! ! ! Y! !Unknown ! ! ! Y*!!

iTE  iT8720  

FTK  Imager  

Command  Line  FTK  for  Mac  

FC5025  

Kyroflux  

Kyroflux  

•  Read  at  lowest  level  possible  -­‐  precisely  sampling  the  magne@c  flux  transi@on  @ming.  

•  Save  as  raw  stream,  or  export  to  common  sector  formats  suppor@ng.