Re: dd and mbr

From: G.Pötting <tuxgp_at_freenet.de>
Date: Tue, 11 Jan 2022 10:40:03 UTC
Hi,

in FreeBSD 13 AMD64 you can get the device name with fdisk -s:

$ sudo fdisk -s
/dev/ada0: 484521 cyl 16 hd 63 sec
Part        Start        Size Type Flags
    1:           1   488397167 0xee 0x00

      -i      Initialize sector 0 of the disk.  Existing slice entries 
will be
              cleared (marked as unused) before editing.  (Compare with -u.)

      -I      Initialize sector 0 slice table for one FreeBSD slice covering
              the entire disk.

# fdisk -i /dev/ada0

or

# fdisk -I /dev/ada0

Am 11.01.22 um 11:25 schrieb Roderick:
>
> No. That does not work. That is why I am asking.
>
> bs=512 is the default. Without count is more than with count.
> How did you come to the idea that that would work?
>
> Rod.
>
> On Tue, 11 Jan 2022, Ralf Mardorf wrote:
>
>> On Tue, 11 Jan 2022 10:02:26 +0000 (UTC), Roderick wrote:
>>> dd if=/dev/zero of=/dev/da0
>>
>> dd if=/dev/zero of=/dev/da0 bs=512 count=1
>>
>> or
>>
>> dd if=/dev/zero of=/dev/da0 bs=512
>>
>> ?
>>
>>
>