Recently, I dual booted my Acer Laptop with Linux Mint, I had created an unallocated space that was around 30GB for Linux. But when I got the drive selection option to install Linux that partition was marked as unusable instead of free space.
This is because there are a total of 5 partitions including the unallocated space.
This HardDisk supports only 4 Partitions and we had created 5. The fifth partition is space for installing the Linux.
The simple way to tackle this problem is to maintain 4 partition limit. We have to delete one partition. Follow the steps mentioned.
Remember: Always take backup of your data otherwise you might lose them.
- Open Disk Management in Windows.
- Now, we have to delete a partition and allocate 30GB to Linux.
- I will delete Partition D for that right click on D and select Delete Volume. (Copy Data of D drive to somewhere else).
- Now we can see 4 partitions but we have to give only 30GB to Linux for that we have to extend the second drive.
- We are going to increase the size of E partition. For that right click on E and select Extend Volume.
- Do some calculation and extend partition in such a way the unallocated space will remain only 30GB.
- Done. Now boot in Linux you will find the partition as Free Space.
With this method, you can make unusable space again usable. After this, you can install Linux normally.