On Sun, 1 Dec 2019 08:28:01 +0100 Gary Jennejohn <[email protected]> wrote:
> The geom code protects certain parts of the data area on the > drive, in particular GPT/MBR areas, unless ``sysctl > kern.geom.debugflags=16'' is run beforehand. One can see this in > many places in the geom code. > > I always set this sysctl when I know I'm going to overwrite the > first sectors of a drive. > Interesting, but I've succefully overwrited MBR many times on FreeBSD 5.x-11.x without setting this sysctl. I've learned about this sysctl when I first time failed to overwrite bsd label inside MBR slice under FreeBSD 7.1 with dd (but not MBR). There was explicit write error, not just silent succeful write to nowhere. I may be wrong, but as I remember, I newer got this trouble again starting from 10.x. Is there something new on 12.x? _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "[email protected]"
