MBR not overwritable with dd?

Jerry McAllister jerrymc at clunix.cl.msu.edu
Sun Oct 10 19:37:29 PDT 2004

> I tried to null out the MBR with the BETA7 fixit CD with the follwoing=20
> command:
> dd if=3D/dev/zero of=3D/dev/ad0 count=3D16
> After that fdsik still showed me a valid partition tabel!
> How? Does GEOM map the beginning of the raw device?

Was it getting it from the in-memory informatino?


> Thank you in advance,

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