Re: [gentoo-user] Trying to loopback mount partition from a disk image

[Alex Schuster]

Volker Armin Hemmann writes:

> On Montag 23 November 2009, Stroller wrote:

> > $ fdisk -l sda.dd.img
> > You must set cylinders.
> > You can do this from the extra functions menu.
> >
> > Disk sda.dd.img: 0 MB, 0 bytes
> > 255 heads, 63 sectors/track, 0 cylinders
> > Units = cylinders of 16065 * 512 = 8225280 bytes
> > Disk identifier: 0x01890189
> >
> >       Device Boot      Start         End      Blocks   Id  System
> > sda.dd.img1   *           1       10010    80405293+   7  HPFS/NTFS
> > Partition 1 has different physical/logical endings:
> >       phys=(1023, 254, 63) logical=(10009, 254, 63)
> > $
> > $ sudo losetup -o 8225280 /dev/loop0 sda.dd.img

Try -o $(( 63*512 )). 63 is the start sector, you see this when you enter 
the U command in fdisk in order to change the units.

> yeah, you don't need to use losetup. I mounted a lot of images over the
> years and I never used losetup.

Um, even if the partition does not start at the beginning? I tried this a 
while ago, giving the offset directly as mount option, but it did not work 
at all. But when I also tried it manually with losetup, I succeeded.

	Wonko