linux-kernel - Re: completely hide parts of the partition table from Windows?

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Message-ID: <19088.30487.498496.389348@pilspetsen.it.uu.se>
Date:	Sun, 23 Aug 2009 00:54:15 +0200
From:	Mikael Pettersson <mikpe@...uu.se>
To:	Mikael Pettersson <mikpe@...uu.se>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	Andries Brouwer <aeb@....nl>
Subject: Re: completely hide parts of the partition table from Windows?

Mikael Pettersson writes:
 > Alan Cox writes:
 >  > > Any recommendations? If no existing partition table format is suitable
 >  > > for my use case then I'm perfectly willing to invent a simple new format
 >  > > and add the corresponding parser to the kernel.
 >  > 
 >  > Or if its not the boot partition can you not just tell device mapper about
 >  > it and create a device mapper device of the offset ?
 > 
 > I have no experience with the device mapper, but I'll give it a
 > try and see how it works out. Thanks for the suggestion.

Doesn't work. I have unpartitioned space at the end of /dev/sda,
but attempting to dmsetup create test --table '0 N linear /dev/sda M'
fails in dm-table:__table_get_device() with -EBUSY. It does seem to
work if the disk in question has no mounted partitions, but that
won't be the case when the disk is in my laptop.
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