[Oberon] Re (2): Writing BootManager using dd.

[peter at easthope.ca]

From:	Treutwein Bernhard <Bernhard.Treutwein at Verwaltung.Uni-Muenchen.DE>
Date:	Tue, 6 Jul 2021 11:08:48 +0000
> be careful, in principle you are correct, but afaik this overwrites 
> also the partition table (which is located in the last ? bytes of the 
> boot sector, but I am not really sure about the number of bytes in the 
> moment).
> 
> As far as I found in the hurry, you need an bs=446 in addition to your 
> parameters, see 
> https://homepages.cwi.nl/~aeb/linux/disk/partition_types-2.html#ss2.5 

Thanks Bernhard.  I'd forgotten that.  In fact the MBR is explained in 
https://en.wikibooks.org/wiki/Oberon/ETH_Oberon/bootmbr 
salvaged to the wikibook a year or two back.  The author could have 
been Andr Fischer.  I don't know.

I've added the instructions for dd in section 4.2 of 
https://en.wikibooks.org/wiki/Oberon/BootManager .

With bs=446 for the MBR, the commands succeed.  Good opportunity to 
review and update the documentation.

Thx,                ... P.L.


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