List VMs
VBoxManage list vms
Show VM
VBoxManage showvminfo ubuntu18.04
Create a load of big disks
for i in {1..24}; do VBoxManage createhd --filename 12T_$i.vdi --size 11444090 --format VDI --variant Standard; done
Attach a load of big disks
(Use the LSI SAS controller if you want to attach more that 30 disks to one controller)
for i in {1..24}; do VBoxManage storageattach ubuntu18.04 --storagectl "SATA" --device 0 --port $i --type hdd --medium 12T_$i.vdi; done