Test in BIOS mode: ubuntu@ubuntu:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Groovy Gorilla (development branch) Release: 20.10 Codename: groovy ubuntu@ubuntu:~$ ls -l / total 2 lrwxrwxrwx 1 root root 7 Sep 15 22:16 bin -> usr/bin drwxr-xr-x 1 root root 60 Sep 15 22:24 boot dr-xr-xr-x 1 root root 2048 Sep 15 22:34 cdrom drwxr-xr-x 22 root root 4940 Sep 16 06:28 dev drwxr-xr-x 1 root root 560 Sep 16 06:25 etc drwxr-xr-x 1 root root 60 Sep 16 06:25 home lrwxrwxrwx 1 root root 7 Sep 15 22:16 lib -> usr/lib lrwxrwxrwx 1 root root 9 Sep 15 22:16 lib32 -> usr/lib32 lrwxrwxrwx 1 root root 9 Sep 15 22:16 lib64 -> usr/lib64 lrwxrwxrwx 1 root root 10 Sep 15 22:16 libx32 -> usr/libx32 drwxr-xr-x 1 root root 60 Sep 16 06:25 media drwxr-xr-x 2 root root 3 Sep 15 22:16 mnt drwxr-xr-x 2 root root 3 Sep 15 22:16 opt dr-xr-xr-x 339 root root 0 Sep 16 06:24 proc drwxr-xr-x 18 root root 308 Sep 15 22:25 rofs drwx------ 1 root root 60 Sep 15 22:24 root drwxr-xr-x 32 root root 980 Sep 16 06:28 run lrwxrwxrwx 1 root root 8 Sep 15 22:16 sbin -> usr/sbin drwxr-xr-x 8 root root 133 Sep 15 22:26 snap drwxr-xr-x 2 root root 3 Sep 15 22:16 srv dr-xr-xr-x 13 root root 0 Sep 16 06:24 sys drwxrwxrwt 16 root root 340 Sep 16 06:28 tmp drwxr-xr-x 1 root root 100 Sep 15 22:16 usr drwxr-xr-x 1 root root 160 Sep 15 22:24 var ubuntu@ubuntu:~$ test -d /sys/firmware/efi && echo efi || echo bios bios ubuntu@ubuntu:~$ sudo lshw|grep -im3 product product: Precision M4800 (Precision M4800) product: 0T3YTY product: Intel(R) Core(TM) i7-4810MQ CPU @ 2.80GHz ubuntu@ubuntu:~$ lsblk -lfm NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINT SIZE OWNER GROUP MODE loop0 squashfs 4.0 0 100% /rofs 2G root disk brw-rw---- loop1 squashfs 4.0 0 100% /snap/snap-store/467 49.8M root disk brw-rw---- loop2 squashfs 4.0 0 100% /snap/snapd/8790 29.9M root disk brw-rw---- loop3 squashfs 4.0 0 100% /snap/gtk-common-themes/1506 62.1M root disk brw-rw---- loop4 squashfs 4.0 0 100% /snap/core18/1885 55.3M root disk brw-rw---- loop5 squashfs 4.0 0 100% /snap/gnome-3-34-1804/36 255.6M root disk brw-rw---- sda 238.5G root disk brw-rw---- sda1 ext4 1.0 bionic 2093f8d6-7840-4256-8edc-4db97e865784 152.5G root disk brw-rw---- sda2 swap 1 4b882c9f-4867-4c5c-8eb7-c84ef03f4786 [SWAP] 6G root disk brw-rw---- sda3 ext4 1.0 focal 31f64dfc-933a-4f48-9209-e7a7b016d8c9 80G root disk brw-rw---- sdb iso9660 Joliet Extension Ubuntu 20.10 amd64 2020-09-15-22-35-02-00 55.9G root disk brw-rw---- sdb1 iso9660 Joliet Extension Ubuntu 20.10 amd64 2020-09-15-22-35-02-00 0 100% /cdrom 2.8G root disk brw-rw---- sdb2 vfat FAT12 ESP 6903-0707 4.9M root disk brw-rw---- sdb3 53.1G root disk brw-rw---- sr0 1024M root cdrom brw-rw---- ubuntu@ubuntu:~$ df -h Filesystem Size Used Avail Use% Mounted on tmpfs 1.6G 2.0M 1.6G 1% /run /dev/sdb1 2.8G 2.8G 0 100% /cdrom /cow 7.8G 95M 7.7G 2% / tmpfs 7.8G 0 7.8G 0% /dev/shm tmpfs 5.0M 8.0K 5.0M 1% /run/lock tmpfs 4.0M 0 4.0M 0% /sys/fs/cgroup tmpfs 7.8G 0 7.8G 0% /tmp tmpfs 1.6G 140K 1.6G 1% /run/user/999 ubuntu@ubuntu:~$ -o- When iso testing the current daily Lubuntu iso file (dated 2020-09-15), I notice that a third partition is created (during the boot process), but no file system is recognized by lsblk -f, and it is not used for logging (as we are used to from Focal and previous versions of Groovy). -o- Test in UEFI mode: ubuntu@ubuntu:~$ test -d /sys/firmware/efi/ && echo efi || echo bios efi ubuntu@ubuntu:~$ sudo lshw| grep -im3 product product: Precision M4800 (Precision M4800) product: 0T3YTY product: Intel(R) Core(TM) i7-4810MQ CPU @ 2.80GHz ubuntu@ubuntu:~$ lsblk -lfm NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINT SIZE OWNER GROUP MODE loop0 squashfs 4.0 0 100% /rofs 2G root disk brw-rw---- loop1 squashfs 4.0 0 100% /snap/core18/1885 55.3M root disk brw-rw---- loop2 squashfs 4.0 0 100% /snap/gnome-3-34-1804/36 255.6M root disk brw-rw---- loop3 squashfs 4.0 0 100% /snap/gtk-common-themes/1506 62.1M root disk brw-rw---- loop4 squashfs 4.0 0 100% /snap/snap-store/467 49.8M root disk brw-rw---- loop5 squashfs 4.0 0 100% /snap/snapd/8790 29.9M root disk brw-rw---- sda iso9660 Joliet Extension Ubuntu 20.10 amd64 2020-09-15-22-35-02-00 55.9G root disk brw-rw---- sda1 iso9660 Joliet Extension Ubuntu 20.10 amd64 2020-09-15-22-35-02-00 0 100% /cdrom 2.8G root disk brw-rw---- sda2 vfat FAT12 ESP 6903-0707 4.9M root disk brw-rw---- sda3 53.1G root disk brw-rw---- sdb 238.5G root disk brw-rw---- sdb1 ext4 1.0 bionic 2093f8d6-7840-4256-8edc-4db97e865784 152.5G root disk brw-rw---- sdb2 swap 1 4b882c9f-4867-4c5c-8eb7-c84ef03f4786 [SWAP] 6G root disk brw-rw---- sdb3 ext4 1.0 focal 31f64dfc-933a-4f48-9209-e7a7b016d8c9 80G root disk brw-rw---- sr0 1024M root cdrom brw-rw---- ubuntu@ubuntu:~$ df -h Filesystem Size Used Avail Use% Mounted on tmpfs 1.6G 2.0M 1.6G 1% /run /dev/sda1 2.8G 2.8G 0 100% /cdrom /cow 7.8G 87M 7.7G 2% / tmpfs 7.8G 0 7.8G 0% /dev/shm tmpfs 5.0M 8.0K 5.0M 1% /run/lock tmpfs 4.0M 0 4.0M 0% /sys/fs/cgroup tmpfs 7.8G 0 7.8G 0% /tmp tmpfs 1.6G 136K 1.6G 1% /run/user/999 ubuntu@ubuntu:~$