on 16/12/2009 11:28 Marian Hettwer said the following: > Hej Marcel, > > > On Tue, 15 Dec 2009 16:46:27 -0800, Marcel Moolenaar <xcl...@mac.com> > wrote: >> Yes, if you have ad2a and not ad2s1a, then you have a >> proper dangerously dedicated disk and FreeBSD 8.x will >> work correctly with your disk. >> >> If you installed "dangerously dedicated" and ended up >> with ad0s1a (note the "s1"), then you have an invalid >> partitioning and FreeBSD 8.x will not give you what >> you've been getting on FreeBSD 7.x. Most of the time >> you only need to wipe out the second sector on the >> disk to clean it up and have FreeBSD 8.x also give >> you ad0s1a. >> > okay... but how do I wipe out the second sector? > dd if=/dev/zero of=/dev/ad8 count=1 > would wipe out the first 512 bytes.
You need to add seek=1 (or oseek=1, which is the same but a little bit more obvious) to that command. > I'm always confused with sectors vs. > bytes. You are not confused this time, HDD sector is 512 bytes. This is the default dd block size too. -- Andriy Gapon _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"