Because, there is no guarantee that the drives will be loaded in a given order 
on boot, there would be little benefit in changing the example.  If the entire 
page is read, everything should be clear enough, but if anything were to be 
done, perhaps there could be a reminder within each subsection to verify the 
disk with ‘sysctl hw.disknames’ and ‘disklabel’.  
Simply changing the example, though, won’t fix the problem of a user not paying 
sufficient attention to protect themselves from themselves. 

> On Jan 22, 2021, at 14:20, tetrahe...@danwin1210.me wrote:
> 
> When installing from a USB thumb drive, the machine's internal HDD usually 
> shows up as sd0 and the thumb drive as sd1.
> 
> However, the FDE installation instructions 
> <https://www.openbsd.org/faq/faq14.html#softraidFDE> suggest that we should 
> overwite the first 1MB of sd1 with zeros:
> 
>> # dd if=/dev/zero of=/dev/rsd1c bs=1m count=1
> 
> If the user is installing from a USB drive, this will lead to them 
> overwriting the USB drive, rather than the pseudo-device.
> 

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