Try running the command
fdisk -l <img file>. Typically if the
.img files are entire disks from say a KVM VM then they're technically a virtual disk.
I've got a CentOS KVM VM which shows up like so with the
$ file centostest.img
centostest.img: x86 boot sector; partition 1: ID=0x83, active, starthead 1, startsector 63, 208782 sectors; partition 2: ID=0x8e, starthead 0, startsector 208845, 20755980 sectors, code offset 0x48
fdisk with it:
$ sudo /sbin/fdisk -lu /kvm/centostest.img
last_lba(): I don't know how to handle files with mode 81ed
You must set cylinders.
You can do this from the extra functions menu.
Disk /kvm/centostest.img: 0 MB, 0 bytes
255 heads, 63 sectors/track, 0 cylinders, total 0 sectors
Units = sectors of 1 * 512 = 512 bytes
Device Boot Start End Blocks Id System
/kvm/centostest.img1 * 63 208844 104391 83 Linux
/kvm/centostest.img2 208845 20964824 10377990 8e Linux LVM
Partition 2 has different physical/logical endings:
phys=(1023, 254, 63) logical=(1304, 254, 63)
If you'd like to mount one of these partitions you can do so as follows:
fdisk (cylinder output)
fdisk (sector output)
- block-size of 512 bytes and the start-block is 63.
- The offset is 512 * 63 = 32256.
- block-size of 512 bytes and the start-block is 1.
- The offset is 512 * 1 = 512.
So the mount command would be:
$ mount -o loop,offset=32256 centostest.img /mnt/tmp
To mount the other partition (512 * 208845 = 106928640):
$ mount -o loop,offset=106928640 centostest.img /mnt/tmp
$ mount -o loop,offset=512 centostest.img /mnt/tmp
To mount the other partition (512 * 14 = 7168):
$ mount -o loop,offset=7168 centostest.img /mnt/tmp
This will only work if mount can determine the type of filesystem within the "partition" you're attempting to mount. You may need to include
-t auto, or be specific and tell
mount that's it's
-t ext4 for example.