This is the error code produced when trying to create a system image of Windows 7 onto a backup drive, and this is what you see.
" There is not enough disk space to create the volume shadow copy on storage location. Make sure that for all volume to be backup up, the minimum disk space required for shadow copy creation is available. this applies to both the backup storage destination and volume included in the backup. Minimum requirement for Volumes less than 500 megabytes, the minimum is 50 megabyte of free space. for volumes more than 500 megabytes, the minimum is 320 megabytes of free space. Recommended at least 1 gigabytes free of disk space on each volumes if volumes size is more than 1 gigabytes (0x80780119)"
It happens because the 100mb System Partition created by Windows 7 at the point of installation is ok for normal running, but is too small when the need for a Windows Backup system image is required.
In my case, it came about because of the problems encountered when trying to run Windows 7 and 8 on the same machine. The only way I can run Windows 8 is for it to be the sole OS. So, I have to UPGRADE to Windows 8, effectively scrubbing Windows 7, but I still want to be able to bring Windows 7 back easily in the event that Windows 8 causes me more grief.
OK.. the System Partition needs to be less than half used to enable the System Image to be created but, unfortunately, more than half of the 100mb is used up in normal operation.
There are instructions re fixing this problem which include the use of Windows Shrink and Diskpart. I would not recommend anybody using Diskpart anywhere close to the main boot drive. It is rather like wielding a gun that has a hair trigger. One false move and KABOOM. The best way is to use an simple partition manager, and they don’t come more simple than Easeus Partition Manager.
What you do is reduce the size of the main OS partition, leaving space in FRONT of C, ok and apply the change, wait for one and a half reboots, resize the System partition to be around 200mb (mine is 305mb), but no more than 500mb, using the space freed up in the first part of the operation, wait for one and a half reboots, take up any slack left by the resizing and add it back to C, wait for one and a half boots, and voila. Job done.
Now you can create your System Image using Windows 7 Backup, and the repair disk (a CD will do) which enables you to get to the System image if all goes wrong..
If you are wondering what constitutes a ‘half’ boot, I will tell you. When Easeus is called upon to do any partitioning work on a drive which has been or is being used as a boot drive, it tells you that the operation has completed successfully, reboots, tells you again, and then allows the OS to boot to a usable desktop..