Re: mount foo.img problem
On Sat, Feb 07, 2009 at 03:28:20PM -0600, Boyd Stephen Smith Jr. wrote:
> On Saturday 07 February 2009 13:37:46 Thomas H. George wrote:
> > On Sat, Feb 07, 2009 at 10:44:47AM -0600, Boyd Stephen Smith Jr. wrote:
> > > On Saturday 07 February 2009 10:31:17 Thomas H. George wrote:
> > > > What must I do to be able to mount this image file?
> > > Could you run "file debxo-awesome.ext3.img" can provide the output?
> > dragon:/data/olpc# file debxo-awesome.ext3.img
> > debxo-awesome.ext3.img: x86 boot sector; partition 1: ID=0x83, active,
> > starthead 1, startsector 32, 3848160 sectors dragon:/data/olpc# exit
>
> It looks like it is a whole-disk image -- the first part of it appears to be
> an MBR. You'll need to use some loopback parameters to skip the MBR and
> partition table. I think you only need to skip 512 bytes... could you try:
> tail -c +513 debxo-awesome.ext3.img | file -
> and see if that reports that it found an ext3 filesystem.
Script started on Sat 07 Feb 2009 05:14:12 PM EST
dragon:/data/olpc# tail -c +513 debxo-awesome.ext3.img | file -
/dev/stdin: GRand Unified Bootloader stage1_5 version 3.2, identifier 0x2, GRUB version 0.97, configuration file \377
dragon:/data/olpc# exit
Script done on Sat 07 Feb 2009 05:15:09 PM EST
So I tried
Script started on Sat 07 Feb 2009 05:20:59 PM EST
dragon:/data/olpc# mount -o loop.offset=512 -t ext3 debxo-awesome.ext3.img /medi a/sdloop
mount: /data/olpc/debxo-awesome.ext3.img is not a block device (maybe try `-o loop'?)
dragon:/data/olpc# exit
which seemed to be what the Debian Reference suggested but I guess this
is not quite right.
Script done on Sat 07 Feb 2009 05:21:57 PM EST
>
> > The image was meant to be transfered to a USB device but the
> > instructions said that if the device was less than 2 Gb it could be loop
> > mounted as ext3 in order to copy the guts of the image to a smaller USB
> > device.
>
> It can be, but in this case it's not as simple as just using the loop mount
> option, unfortunately. You'll probably need just the additional offset
> option. Once we find the offset, things should be "easy"; although, after you
> move the files over, you'll also want to dd the MBR over as well.
> --
> Boyd Stephen Smith Jr. ,= ,-_-. =.
> bss@iguanasuicide.net ((_/)o o(\_))
> ICQ: 514984 YM/AIM: DaTwinkDaddy `-'(. .)`-'
> http://iguanasuicide.net/ \_/
>
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