[Fedora-xen] kvm crash on f8

[John Summerfield]

Richard W.M. Jones wrote:
> John Summerfield wrote:
>>
>> I looked at some images in /var/lib/xen/images/ and since they have 
>> partition tables and look, to me, just like disks, I copied part of my 
>> hard disk to /var/lib/xen/images/WindowsXP.img
>>
>> The reason is that I want to try the Windows XP that came 
>> preinstalled, and copying /dev/sda for a length I calculated includes 
>> the entire /dev/sda1 partition seems a likely way to test it.
>> These are the commands:
>> dd if=/dev/sda of=/var/lib/xen/images/WindowsXP.img count=76597082
>> dd of=/var/lib/xen/images/WindowsXP.img seek=320072933376 bs=1 count=0
> 
> I don't understand this second command.  What's the input?  Are you 
> typing something on stdin (eg. ^D)?

count=0 -- doesn't read anything.
Its purpose is to make a 320 Gbyte file, to match the source disk in
size. It becomes a sparse file, effectively with lots of zeroes between
the end of data copied with the first command.

I've since edited the partition table with GNU Parted, it now looks like
this:
[root at potoroo ~]# parted /var/lib/xen/images/WindowsXP.img
GNU Parted 1.8.6
Using /var/lib/xen/images/WindowsXP.img
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print
Model:  (file)
Disk /var/lib/xen/images/WindowsXP.img: 320GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type     File system  Flags
  1      32.3kB  71.3GB  71.3GB  primary  ntfs         boot

(parted) q
[root at potoroo ~]#

It approximates to how I've copied Windows systems around on real
hardware from time to time. If I were to copy that file to a real disk
and boot in real hardware, I would fully expect it to work.


how embarrassing. I needed to copy about 80 Gbytes, and only copied half 
that.

Worse, the boot sector has grub in it.

The good news is that the system now boots grub sans menu. I typed in 
the necessary information to boot windows:
chainloader (hd0,0)+1
boot

and windows boots all the way to a BSOD and the stuff on the screen 
recommends "chkdsk /f."

Hmm. Type to find a rescue system.



-- 

Cheers
John

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