Something happened to raid1. I want to disassemble the array while saving the data. But there is no function to split a mirrored volume. What to do?

Question

Windows

Answer 1

Don't touch the discs. The array is resynchronized and that's it. wait
Raid 1 This is just a mirror copy of the disks. If you did exactly that. You can just disable 1 drive. Then connect it to any machine and copy the data

Answer 2

Something happened

The description, of course, leaves room for thought, but in general, you can try to figure it out.
- Has something like this happened before?
- After what (what operations, actions, etc.) did something start?
- Is something actually happening - is the disk activity indicator blinking on the case (if it should normally)?
Given that you have RAID 1, it would be good to remove the disks and connect first one, then the other to another computer. When making connections, check that at least the most important data is in order. With this configuration of the mirror, the data should be visible without tricks.
Working on the same machine is not the best option in terms of data risk. But if you want to try, despite this, then it is worth getting at least a more complete picture of the situation.
Check that there are no bads on one of the disks and that the reason for the plug is not that they are being synchronized. You don't have disk connections described, but I believe that R.tester should see them as separate devices. Check out SMART. R.saver
can help further - it can work with individual disks and automatically collect RAID arrays. It can also be used if the contents of individual disks are not visible when connected to another computer - the program should see everything even without scanning and then copy the information.
Generally speaking, if you want to strip the array and go to a "single disk" configuration, it's safer to copy the data somewhere, check that the copy is ok, connect one of the array's former disks as you wish, format it, and copy the data there.