I have a system with two 1Tb and one 2Tb hard drives, the first 1Tb disk has Ubuntu16.04.6LTS and I want to install Ubuntu20LTS on the second 1Tb disk. I made a bootable USB and from boot menu chose to boot from the USB. At allocate drive space chose something else and in Installation type window, chose the second drive /dev/sdb.
Followed steps from here and partitioned my /dev/sdb into /dev/sdb1(type swap), /dev/sdb5(type ext4, mount point /) and /dev/sdb6(type ext4, mount point /home), I hope none of this is messing with whatever is on dev/sda?
After this, if I select dev/sdb for boot loader installation it says it will erase partition #5 of SCSI(0,0,0)(sda) as swap apart from sdb's partitions. Is this okay, it won't affect ubuntu on sda?
This post suggests removing the disk with old ubuntu first, and then proceeding, but I don't think I can do that.
