From: Jerome Shidel <jer...@shidel.net>
A 1.44MB 3.5rCY DS HD floppy disk is 1,474,560 bytes when formatted. (2MB unformatted) It used 512 byte sectors, 18 sectors per track, 80 tracks per side and is/was a two sided media. 512 * 18 * 80 * 2 = 1474560 / 1024 = 1.44MB floppy. More information on this can be found at https://en.wikipedia.org/wiki/List_of_floppy_disk_formats Also, on Mac, Unix and Linux dd will write the disk image fine with a command like: sudo dd if=FD12FLOPPY.img of=/dev/fd0 (or similar) As a side note, PC-DOS 7 used oddly formatted diskettes for its install media. These provided a capacity lager than 1.44MB on its 3.5rCY install media. This was good to reduce the number of diskettes required. But, it made it more difficult to clone the original floppy disks for backup purposes. Also, it was not 100% compatible with all floppy drives and could cause other headaches as well. Jerome ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user --- Internet Rex 2.29 * Origin: capcity2.synchro.net - 502/875-8938 (276:10/901) --- Synchronet 3.15a-Linux ListGate 1.3 * Capitol City Online - Frankfort, KY - telnet://capitolcityonline.net ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
