![]() ![]() $ diskutil unmount /dev/disk1 & diskutil secureErase 0 /dev/disk1 This single-pass zero-fill erase took less than 30 seconds to complete. Macworld and the diskutil manpage turned up a much faster method that had the additional benefit of not requiring root privileges: That worked beautifully, if slowly: it took almost two minutes to wipe a single floppy disk ( fiddling with the block size seemed to help, but I was not inclined to spend much time investigating further see update below). What if we unmount the floppy from the Finder and then try the same command?Ī quick search turned up the answer - unmount from within diskutil, not the Finder:ġ474560 bytes transferred in 110.617912 secs (13330 bytes/sec) In that case, let's have a look at what we've got: I decided to give sudo dd if=/dev/zero of=/dev/fd0 a go: Securely wiping floppy disks under OS X in Terminal #įaced with several dozen floppy disks that needed wiping, Disk Utility.app was looking a bit cumbersome: Disk Utility > click floppy drive > Erase > Security Options. ![]() Securely wiping floppy disks under OS X in Terminal ![]()
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