One of the benefits of using VirtualBox is that I can take snapshots of the system, however I don't really want to snapshot the contents of /var/lib/docker or /home. Any volumes that are classed by VirtualBox as "write through" or "immutable" won't be affected by snapshots. This is also useful for any volumes that contain just data.

• / (root drive) should be on a normal drive
• /home should be on a write through drive
• /var/lib/docker should be on a write through drive
• Use fixed drives where possible unless you're worried about write cycles

VBoxManage setextradata global GUI/MaxGuestResolution any
VBoxManage setextradata "ArchLinux_default_1543231149945_24624" "CustomVideoMode1" "1920x1080x24"
VBoxManage setextradata "ArchLinux_default_1543231149945_24624" "CustomVideoMode2" "1920x1080x24"

• Do not enable 3D acceleration for Linux
• Use as much VRAM as is available, as long as it doesn't go into the red zone
• Network adapter may need to be NAT when behind a proxy and bridged adapter otherwise
• Prefer a stable file system like ext4 over btrfs
  • I nearly lost a btrfs system today (14th June 2019).
  • I recovered from a "child eb" issue with btrfs rescue super-recover /dev/<label> but YMMV