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Depending on the way your imaging software is written, this could be a difficult to impossible task. There are a couple of hoops you may have to jump through to get it to work. But that's not the real problem!
I have one physical hard drive which, before installing the OS, I split into two partitions: a C drive and a D drive. I have Windows 7 Professional 64-bit with SP1 installed. I use EaseUS Todo Backup Free to take a weekly image of C and have it saved onto D. I also save the last months worth of images, as well as the initial image from when I first installed the OS. My question is this: If I resize both partitions by moving some of the free space from the C partition and adding it to the D partition (so now the size of C is smaller than when any prior images were taken), would those prior images still restore properly if the need ever came to use them? And if they would still restore properly, upon restoration, would I then find my partitions returned to the sizes when the image was taken?
In this excerpt from Answercast #23, I look at the issues encountered when trying to restore a backup image to a partition of a different size.
What you're doing makes me very nervous. The reason I say this is because I've experience this scenario, almost exactly this scenario although not with that particular program. This is a scenario that can cause backup programs some problems.
My experience was attempting to restore a 1.5 TB image to a 1 TB drive. Obviously, the image was not full. I had less than a terabyte of data in the image, but because the partition that I was restoring to was smaller than the partition I had backed up from, the backup program balked. It basically wouldn't let me use the normal partition restoration tools to restore.
I had to jump through a couple of hoops to make it happen and ultimately it wasn't pretty. I was actually kind-of disappointed in the backup software that I was using.
I do not know if EaseUS Todo will handle this scenario properly for you. I would strongly recommend you go out to their support site and ask exactly this same question because they're the ones that are gonna have to give you a qualified answer as to that program's capabilities. I think you do run the risk of any of these three scenarios, you might consider.
It may just work: as long as the amount of data that you're restoring is less than the size of the partition than you are restoring it to.
It may fail as mine failed – because the partitions are of different sizes. Fortunately, I hope it will fail early! Mine did. It didn't even start because it said, "Oh, wait a minute. The partitions are the wrong size. I can't do this."
The third solution is that it's possible that restoring the partition could restore the size of the partition. Unfortunately, that would impact your D drive: exactly how that would work if it happens, I honestly don't know.
I consider it a pretty risky proposition all in all.
Now, there's something about what you've described that I consider even riskier. I'm going to suggest you stop doing it!
Realize that if that hard drive dies, you lose both the original partition and all the backups that you placed on that same drive. That is really a bad idea. Backups can save you from some things, but a hard drive failure is going to be catastrophic and you will end up losing everything.
At a minimum, I suggest that you get another drive. I suggest you get yourself an external drive, probably even larger, that has the room you need. Have the backups go to that external drive. If for whatever reason your internal drive (with however many partitions you would like to have on it) fails completely, then you will have the backups on a different media, in a different place that will not have been affected by that hard drive dying.
Coincidentally, if you do change the way things are backed up, then this whole concept of partition sizes gets a little bit more flexible for you. I think you have more options.
Finally, I really do think you need to talk to the EaseUS people to
understand exactly how their backup software is going to react to the scenario
that you described.
Next from Answercast 23- I dropped my external hard disk, how do I recover the data?
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