Is there a way to perform the equivalent of (Windows') diskpart clean via MacOS X? I have to completely bomb some drives so that they can be formatted correctly in a buffalo Linkstation that I have. However it's posing an issue as it's very picky about what's on the drives before it formats (something I was unaware of when I bought it).
Performing diskutil eraseDisk is good and all, but it forces me to also select a filesystem and volume name. diskpart clean on Windows doesn't do this, and produces a "clean" disk (with no volumes at all), which is what I want.
An easy-to-use, albeit slightly dangerous, method would be to simply overwrite the partition table:
dd if=/dev/zero of=/dev/diskX bs=1m count=2
... where diskX is the disk you want to nuke. Be careful because this command won’t ask.
This writes zeroes to the first 2 MiB, which should be sufficient to remove any and all partitioning schemes and whatnot.
Update: It might also be necessary to nuke the backup GPT table at the end of the disk:
dd if=/dev/zero of=/dev/diskX bs=1m seek=1907727
... with 1907727 being a value for a standard 2 TB consumer drive of I own, which has a total size of 2,000,398,934,016 bytes. I selected 2000398934016 / (1024 * 1024) - 2, discarding any decimal places.
Both count and seek in the command lines above are multiples of the block size bs specified on the same command line.
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