Share hard drives between W7 and W10.

[luiHS]

I'm having trouble sharing hard drives between an SSD running Windows 7 and another SSD running Windows 10. I have one SSD running W7, one SSD running W10, and three hard drives for data.

When I first boot into Windows 7 or Windows 10 everything goes fine. The problem is that after starting with Windows 10, if I turn off and start with Windows 7 it gives me problem messages on all the hard drives, it gives me the option to continue with a check, I assume it will do a CHKDSK. I can skip these checks by pressing any key, but that will not prevent those messages from appearing again every time I boot, and the worst thing is that I can no longer make a backup of Windows 7 because it tells me that the destination hard drives are damaged and need a check.

I don't know what happens that when starting with Windows 10 it leaves all the hard drives in a state that later when starting with Windows 7 it detects that they have problems or damages, when in reality all the hard drives are perfectly fine and chkdsk does not detect any errors.

Right now I have both W7 and W10 on separate hard drives, because little by little I will move to W10 installing everything I have on W7, that is why I cannot make an immediate change by removing the SSD with Windows7.

Is there a way to prevent this from happening?.

[Halcyon]

I would suggest that the issue with Windows 10 is that "shutdown" doesn't actually mean shutdown. Rather, most of the default options hibernates Windows, which means that disks aren't going to dismount cleanly first (so that they are ready for use again when the machine wakes up).

Test this theory. In a command line, issue the command: shutdown /s /t 0

[iMo]

You have to uncheck this in Win10 - see below..
And let the CHKDSK run afterwards when requested.. (in both)..