How to make two hard drives not see each other?

Question

Hard disks

There is such a task: there is one computer and two hard drives, both will have Windows installed. How to make sure that these disks are not in contact with each other (were independent)? security issue. Let's say if one user (Windows) becomes infected with a virus, this virus could not damage the second user (Windows). There is a crutch way, to poke these hard drives as needed, but the method is a little steamy (pull these wires back and forth)

Addition: there is, let's say, a clean (safe disk), and there is a potentially dangerous one. Here is a dangerous one and I would like to protect it from a safe one. Encrypt secure such a thing, there's a lot of things

Answer 1

Boot into each Windows and remove the drive letter from the unnecessary device.
The assignment of partitions to letters is stored in the registry, and usually the letters are automatically attached when a new device is connected, and since the disks do not change, once you remove the letter, they will not appear by themselves.
Well, it is unlikely that the virus will climb and check the list of devices in order to infect it, so I assume that this will be enough for viruses.
Users, of course, can easily connect / disconnect access on the go.

Answer 2

truecrypt / veocrypt
or bitlocker
with different passes

Answer 3

There is a crutch way, to poke these hard drives as needed, but the method is a bit steamy (pull these wires back and forth)

Or you can disable an unnecessary disk through the Device Manager

Answer 4

What prevents each drive from being disabled in device manager?

Answer 5

Of course, you need to encrypt, of course, backups are our everything

Answer 6

You can also simply specify in the BIOS from which disk to load Windows according to the standard, and if necessary, boot from another - the F11 key (depending on the BIOS) and select another disk.
Concerning record - to limit record of users on each disk. Even if one Windows will try to write to another disk, but it will not have the right to do so.

Answer 7

If you need to do it iron, then here is
https://www.amazon.com/Kingwin-Optimized-Controls-...

Answer 8

I did mechanically, the power switch, or power to one drive, or to the second. The only thing is that when switching, the computer must be turned off, unplugged from the outlet. But I don’t remember what kind of power, in my opinion it’s enough to remove only 12 volts

Answer 9

security issue

Only power off.