The Device Notifier widget incorrectly lists my primary SSD drive holding my
root partition as removable, offering the option to "Open with file manager" or
a large Eject icon. I'm concerned about the latter as I find myself
inexplicably drawn towards it, a bit like Dougal here:-
http://makeagif.com/Gv_eJV

Hopefully it would complain that file system is currently mounted and is safely
behind two thumbscrews and a panel, but I've yet to try.

I'm not sure if the heuristics may be confused by the default partitioning for
UEFI/GPT? sda3 is btrfs as setup by yast2.

chunk:~ # fdisk -l /dev/sda
Disk /dev/sda: 111.8 GiB, 120034123776 bytes, 234441648 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 9ACB1FA5-67CC-474D-A68B-20A8AFB6553F

Device       Start       End   Sectors   Size Type
/dev/sda1     2048    321535    319488   156M EFI System
/dev/sda2   321536   4530175   4208640     2G Linux filesystem
/dev/sda3  4530176 234440703 229910528 109.6G Linux filesystem