Re: [Xen-users] mount a .img file

[Christopher J Petrolino <cpetrolino@xxxxxxxxx>]

Thanks guys that worked perfectly!!!!

On Thu, Jan 13, 2011 at 7:43 PM, Christopher J Petrolino
<cpetrolino@xxxxxxxxx> wrote:
> Never mind I missed Roberto's note. Looks like I am getting there now :)
>
> On Thu, Jan 13, 2011 at 7:40 PM, Christopher J Petrolino
> <cpetrolino@xxxxxxxxx> wrote:
>> As much as I enjoy math, I'd love to be able to mount the whole thing
>> and then use kpartx or equivalent but how would I go about mounting
>> the entire thing? In other words my original problem is that "mount"
>> doesn't like the .img file.
>>
>> On Thu, Jan 13, 2011 at 7:12 PM, John Weekes
>> <lists.xen@xxxxxxxxxxxxxxxxxx> wrote:
>>> To save yourself from having to calculate an offset, you could also mount
>>> the whole image and then use the "kpartx" command to map out the partitions
>>> for you.
>>>
>>> -John
>>>
>>> On 1/13/2011 2:05 PM, Chris Petrolino wrote:
>>>>
>>>> Aha that's most likely what I was forgetting! I will give that a shot and
>>>> report back. Thanks a million guys
>>>>
>>>> Kind Regards,
>>>>
>>>> Christopher James Petrolino
>>>>
>>>>
>>>> On Jan 13, 2011, at 5:01 PM, dave<dave@xxxxxxxxxxxxxxx>  wrote:
>>>>
>>>>> If it's a disk image you need to provide an offset, for example
>>>>>
>>>>> mount -o loop,offset=32256 /xen/guest.img /mnt/tmp
>>>>>
>>>>> the offset depends on the partitioning of the disk file.  for example:
>>>>>
>>>>> ~$ fdisk -l -u -c guest.img
>>>>>
>>>>>    Device Boot      Start         End      Blocks   Id  System
>>>>> guest.img1   *        2048     9920511     4959232   83  Linux
>>>>> guest.img2         9922558    10483711      280577    5  Extended
>>>>> guest.img5         9922560    10483711      280576   82  Linux swap /
>>>>> Solaris
>>>>>
>>>>> this disk image has a 2048 cylinder boot sector, so the offset would be
>>>>> 2048*512, or 1048576
>>>>>
>>>>> another example:
>>>>>
>>>>> ~$ fdisk -l -u -c guestA.img
>>>>>
>>>>>     Device Boot      Start         End      Blocks   Id  System
>>>>> guestA.img1   *          63     1767149      883543+  83  Linux
>>>>> guestA.img2         1767150     1992059      112455    5  Extended
>>>>> guestA.img5         1767213     1992059      112423+  82  Linux swap /
>>>>> Solaris
>>>>>
>>>>> this has a 63 cyl boot sector, so the offset would be 63*512 = 32256.
>>>>>
>>>>> as a shortcut, (in bash shell) you can do this:
>>>>>
>>>>> mount -o loop,offset=$((512*63)) guestA.img /mnt/tmp
>>>>>
>>>>>
>>>>>
>>>>> On 01/13/2011 01:51 PM, Steven Timm wrote:
>>>>>>
>>>>>> What's the output of
>>>>>>
>>>>>> file /xen/guest.img
>>>>>>
>>>>>> probably you need to specify -t ext2
>>>>>> but the file command will tell you for sure.
>>>>>>
>>>>>> Steve
>>>>>>
>>>>>>
>>>>>> On Thu, 13 Jan 2011, Christopher J Petrolino wrote:
>>>>>>
>>>>>>> Ok guys I am wondering if anyone can help me out here. I am trying to
>>>>>>> mount a xen .img file. when I try to do a mount -o loop /xen/guest.img
>>>>>>> /mnt/tmp I get a message saying that I need to specify a partition
>>>>>>> type.. What am I missing?
>>>>>>>
>>>>>>> Many thanks in advance,
>>>>>>>
>>>>>>> CJP
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Xen-users mailing list
>>>>>>> Xen-users@xxxxxxxxxxxxxxxxxxx
>>>>>>> http://lists.xensource.com/xen-users
>>>>>>>
>>>> _______________________________________________
>>>> Xen-users mailing list
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>>>
>>
>

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