I have two computers for my media. My main computer has 8TB, 4TB and 1TB drives for storage. It is running Win 10 and under Storage Spaces setting i'm able to combine all 3 drives for the total of 11.8 TiB of storage. What i'm also able to do is remove disks or add more without having to set up the storage space from the scratch all over again. This works beautifully.
Now, On the other computer I have OMV set up. This computer also has 8TB, 4TB and 1TB drives for storage and it is a back up of the computer above. I have added all 3 drives and created RAID stripe with 11.8 TiB of storage. However with this set up I'm unable to grow RAID or remove any disks without completely erasing the RAID and starting over. I understand that in RAID 5 I can make it grow but I dont want that because my disk space will be far smaller.
So what would be the best set up for me to be able to retain my 11.8 TiB of space but also be able to add or remove disks?
Thank you.