[libvirt-users] Corrupt image?

[mattias]

I took a gzipped qcow2 image 
And do a gunzip on it
But what?
[root at mjw vm]# fdisk w.qcow2 -l

Disk w.qcow2: 0 MB, 0 bytes
255 heads, 63 sectors/track, 0 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

[root at mjw vm]#
The disc should not be 0 mb!!!
The disc worked before i gzipped it