![]() ![]() MS-DOS (FAT) is the most popular format amongst external hard disks, as it’s both readable and writable by nearly all operating systems, Windows and OS X included. With Disk Utility, you have 3 main formats that you can erase your disk to. Once done, press Enter, and your disk should be erased and formatted completely. For example, I’d use “disk2s2” if I wanted to erase Untitled only in the example below: Use eraseDisk to erase the entire external disk, or eraseVolume if you just want to erase a particular partition. If you want to reformat, replace eraseDisk with reformat and delete the “JHFS+” and “diskname” parts of the command. Change “diskname” to the new name you want for the disk, and replace “diskidentifier” to the Disk Identifier obtained from Disk Utility. In the command above, change “JHFS+” to “ HFS+” if you want a volume that is not journalled. Diskutil eraseDisk JHFS+ diskname diskidentifier ![]()
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