Re: dd and mbr

Thanks. Your answer seems to be a real answer and not a wild proposal
to do an experiment.

After taking the device away and plugging it again, I still get the
partition table. Also after plugging other device in between.
Perhaps it is written again?!

No, I do not want to use fdisk, gpart or anything else. I want to see
dd doing what it must do. How could I rely in dd otherwise?

Rod.


On Tue, 11 Jan 2022, Steve O'Hara-Smith wrote:

> On Tue, 11 Jan 2022 10:02:26 +0000 (UTC)
> Roderick <hruodr@gmail.com> wrote:
>
>>
>> The command:
>>
>> dd if=/dev/zero of=/dev/da0
>>
>> does not delete the mbr, I still see the partition table with
>> fdisk. My questions:
>
> 	It does delete the partition table, but fdisk is showing you cached
> data - the clue is in this bit of the output:
>
>             ******* Working on device /dev/ada0 *******
>             parameters extracted from in-core disklabel are:
>
> 	I thought there was a way to get fdisk to read directly but I
> can't find it in the man page now.
>
> -- 
> Steve O'Hara-Smith <steve@sohara.org>
>
>