This is what I want to accomplish and I have to use the "legacy" image to do this but Canonical is phasing out the Debian installer in favor of their "live" installer so I need to get this figured out. Here is what I am trying to create:
/boot - 1G, ext4
LVG volume group
- /root - 4G, ext4
- /var - 2G, ext4
- /home - 1G, ext4
- /tmp - 1G, ext4
- /bak - 1G, ext4
The problem is that I have a single 30 GB drive (Virtual Disk) and the storage configuration screen looks like this:
To continue you need to: Mount a filesystem at / and Select a boot disk
FILE SYSTEM SUMMARY
No disks or partitions mounted.
AVAILABLE DEVICES
[ VBOX_HARDDISK_abc123, local disk, 30G ]
[ Create volume group (LVM) ]
USED DEVICES
No used devices
If I select the "local disk" and choose "Use As Boot Device" then my option to create a volume group (LVM) or RAID goes away.
If I select "Create volume group," then the option is to use the entire disk which then removes the option to "select a boot disk" to continue. I can create a /boot inside the LVM but that is NOT where I want it to reside AND you cannot select it to actually boot from that anyway.
I could add a 1GB disk because it is a virtual machine but I am thinking about the process for a physical machine as well that only "presents" a single disk for the OS to use.
This is the guide with detailed steps I maintain for my base server rollout for 18.04 that I am trying to update for 20.04 - https://hammondslegacy.com/forum/viewtopic.php?f=40&t=244