Henri Derksen  wrote:
> Hello Theo,
>
> T> $ sudo dd if=/dev/rdisk3 of=your-image.img bs=1m
>
> At the Pi 3B+ this gives the error:
> dd: invalid number '1m'
>
> Use 1M instead of 1m  ;-).

Daniele is on a Mac, where it's 1m.  Similarly for *BSD (from where Macs
get their dd).  On Linux it's 1M.

It's really rather annoying they have this difference.

(you can do without the 'bs' blocksize setting, but the copy will go a lot
more slowly as it'll copy one byte at a time)

Theo

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