Originally Posted by fishstick1907
i dont understand what there asking, unmount all the hard drives? i've tried that too, still the same error. Also, i have 3 partitions in use for windows 7 and i need 3 more for linux (you can have only have 4 partitions at a time in a hard drive). i will stick to using vms for now. thanks anyway.
I guess the point in that thread is in the 2nd page: the OP changed the hard disk and solved the problem that way. I do not know if you're willing to do that since you would have to transfer all the content of the old disk onto the new one and there is a non-zero risk to compromise the OSs actually installed; however with tools like Clonezilla or similar can be surprisingly a smooth process.
Anyway, as I have wrote earlier in this thread, you are already fine with the number of partitions: you have 3 primary in use for Win7 and you need to create just 1 extended partition for Linux [see this
for reference]. The latter, which just counts as one partition, can be considered as a container for extended partitions; you're going to use those different sub-partitions as mount points for /, /boot, /swap, /home, etc... Another nice and flexible solution is LVM
, which again would just count as 1 partition.
I hope this would clarify and help.