Message-ID: <4CD1979E.10106@redhat.com>
Date: Wed, 03 Nov 2010 11:10:54 -0600
From: Eric Blake <eblake AT redhat DOT com>
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To: cygwin AT cygwin DOT com
Subject: Re: Harddisks and Patitions - Mappings: Win <-> Cygwin
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On 11/03/2010 10:35 AM, Thomas Jung wrote:
> Hello,
>=20
> is there a file or something where I can see how cygwin
> maps the harddisks in windows to the usual unix style devices?
>=20
> e.g. I can use:
>=20
> dd if=3D/dev/sdb of=3DE:\hd1backup.bin bs=3D4096
>=20
> to backup the whole second harddrive or just
> partitions of that disk if I use if=3D/dev/sdbX

That won't do what you think.  You probably want:

dd if=3D/dev/sdb of=3D/cygdrive/e/hd1backup.bin bs=3D4096

Since dd open()ing the output file using a DOS filename won't
necessarily use the correct binary mode settings that you want.

>=20
> But I can't be sure if that cygwin/unix styled device
> names are the partitions which I think.
>=20
> Where are such "mappings" stored/saved/recorded?

Have you tried the latest snapshot?  According to
https://bugzilla.redhat.com/show_bug.cgi?id=3D649310

cygwin 1.7.8 (and current snapshots) add the ability to do tricks like:

>   $ cygpath -w /dev/sda1
>   \\.\C:
>   $ cygpath -w /proc/sys/Device/CdRom0
>   \\.\D:

as a way of validating that you have selected the correct raw device.

--=20
Eric Blake   eblake AT redhat DOT com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org


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