First time poster. I've used TestDisk successfully before but I'm new to doing this:
My Dad woke up to a Windows computer that had the MBR missing on a 1TB drive. He tried several things, then finally called me. When the Windows repair disk said there wasn't an operating system installed, I pulled the drive, attached it as an external to another computer to discover there was no operating system, or files on the drive. WEIRD. Also, the drive had 3 partitions, and still had them, but two of the three were re-sized:
Originally had C: 100 GB, D: 820 GB (approx), X: 10 GB HP Recovery.
Now the drive is re-partitioned to 100 MB (shows 50 MB free), 920 GB (shows completely empty, when it should have 220 GB of data), and 10 GB (shows 1.53 GB free, has one folder that is empty).
Thankfully he backed up two weeks prior, so not much data was lost, just some reorganizing of folders. We did manage to recover the files with a deep scan, so we're all good on that front.
I would like to repair the file system to get back to the original partitions so we can access his original file structure, and it's a learning exercise for me

I cloned the drive to another, so I am working from image.
I've attached the TestDisk showing various partitions after a Deep Search. Here's my interpretation of what's listed:
Partition 1 looks like the original 100 GB partition (boot partition), so I want to save that.
Partition 2 named Clone, is the name of the drive I gave it when I formatted it, so that can go.
Partitions 3,4,5 are 100 MB partitions but sector sizes are different. Don't need these.
Partitions 6, 7 are 920 GB and is the remainder of the original partition, but when added to the 100 GB partition makes the drive too big? (sector sizes are different as well)
Partitions 8, 9 are the recovery drives, which seem to be the correct size (sector sizes different)
So I'm getting the Structure: Bad on everything except Partitions 1 & 8 (boot and Factory Image partitions) when I try to change partition characteristics.
Can/How do I change the sector count to save the largest partition that has all the data? Help. Need my hand held.
Thank you for any help!