I recently chose to migrate from the 1Tb spinning disk to a 128Gb m.2 + 1Tb HDD, with OS & programs installed on the m.2 and data on the HDD.
I didn't have time to do this as a dedicated task, so needed to keep the previous Windows 10 Pro installation on the old drive to use while I got the new OS set up in my spare time. Coincidentally the previous installation was 32-bit, whereas the new one is 64-bit. This all went off without a hitch, I ran both OS in parallel, got the new one set up and configured, and decided that I'm ready to delete the old installation and clean the 1Tb drive so that it's ready to become a data drive.
Unfortunately I then discovered the System Reserved Partition on the HDD.
Currently my drives are partitioned like so:
- Disk 0: [500mb System Reserved] [931Gb NTFS; old OS]
- Disk 1: [119Gb NTFS Bitlocker Encrypted; new OS]
- Disk 2: [14.91 OEM Partition]
Disk 2 is another m.2 which was included with the machine as a cache drive.
I want to move the System Reserved partition off the 1Tb drive, partly for neatness and to allow me to swap-out the data drive if desired, and partly for boot speed (by putting it on an m.2). Since the cache drive software for Disk 2 is incompatible with Bitlocker, and since I'm running most functions from an m.2 anyway, I'm perfectly happy to format Disk 2 - it seems like a prime candidate for the System Reserved partition. Especially as I would rather not mess around with resizing the Bitlocker-encrypted partition.
So, my question is:
Given that the System Reserved partition is very important (my main OS is currently encrypted, but could be decrypted for this process if necessary); and I don't want to go through another clean install if at all possible...
Is it possible to simply move the System Reserved partition in place to the small m.2, and completely clean the HDD? Would moving it like that affect boot and/or Bitlocker? If so, what is the best way to accomplish it - would I need to disconnect the HDD and repair the installation or something like that? Would I need to decrypt first?