I do use separate pictures in each desktop for ease of identification.

It would probably be helpful to use partitian names.

[note: uuid's scrambled for security]
--------------------------------------------
so here is a simple way to find the disk in use and it's unambiguous UUID

tod@tod-1204:~$ mount                              <<<<<< The Command
/dev/sdb1 on / type ext4 (rw,errors=remount-ro)    <<<<<< The line I wanted to see!
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
gvfs-fuse-daemon on /home/tod/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=tod)
tod@tod-1204:~$ ls -l /dev/disk/by-uuid            <<<<<< The next command
total 0
lrwxrwxrwx 1 root root 10 Sep  1 00:55 05cdfa19-c951-422b-be66-9871958f83ba -> ../../sdb9
lrwxrwxrwx 1 root root 10 Sep  1 00:55 0cc413fe-7bb2-4ff4-9fdb-b6b7767c55b1 -> ../../sdc1
lrwxrwxrwx 1 root root 10 Sep  1 00:55 26cbcb32-de2d-457c-9dce-de56a12e0c6d -> ../../sdb6
lrwxrwxrwx 1 root root 11 Sep  1 00:55 39bbcc4b-2f15-4e70-b09c-badc03e44e21 -> ../../sdb10
lrwxrwxrwx 1 root root 11 Sep  1 00:55 3cbaf86e-d6fd-4498-b446-1661aaf4364d -> ../../sdb13
lrwxrwxrwx 1 root root 10 Sep  1 00:55 486779e8-c99b-4900-b0b4-f735ee4d88e9 -> ../../sda1
lrwxrwxrwx 1 root root 10 Sep  1 00:55 6499a8e5-b6b4-5683-9135-4146728d7102 -> ../../sdb5
lrwxrwxrwx 1 root root 11 Sep  1 00:55 654bae5d-9440-4a44-a211-eb163336919c -> ../../sdb15
lrwxrwxrwx 1 root root 10 Sep  1 00:55 65eafd02-9a26-4355-817a-c29f97dd11cb -> ../../sdb2
lrwxrwxrwx 1 root root 10 Sep  1 00:55 89bad1f1-475d-4788-ae7e-b46c4a6b8479 -> ../../sdb1  << it's UUID!!!
lrwxrwxrwx 1 root root 11 Sep  1 00:55 a35899e2-bc3e-49dd-80f6-35f315cc426f -> ../../sdb11
lrwxrwxrwx 1 root root 11 Sep  1 00:55 a53bb68d-bd94-4955-9bf5-e38ef218c1fa -> ../../sdb14
lrwxrwxrwx 1 root root 10 Sep  1 00:55 ab568d75-3b9a-426a-b566-a61db8526a05 -> ../../sdb7
lrwxrwxrwx 1 root root 10 Sep  1 00:55 ae80baf7-6429-4932-91bf-c8ea269363ba -> ../../sdc2
lrwxrwxrwx 1 root root 10 Sep  1 00:55 CDF9-4CD0 -> ../../sdb8
lrwxrwxrwx 1 root root 11 Sep  1 00:55 BF99-21F0 -> ../../sdb12
lrwxrwxrwx 1 root root 10 Sep  1 00:55 BECCFE7C9CFE2F11 -> ../../sdd1
lrwxrwxrwx 1 root root 10 Sep  1 00:55 eef36365-3989-49c7-8e43-94bf03799a3c -> ../../sdb4
---------------------------------------

But I think you are asking "where did I boot from?" which can be a very interesting thing to find.
I cannot think of any fingerprints left by the loader other than perhaps "boot-once" from grub.
Perhaps you can add a command in through a section of grub whereby you can talk to a file so you could query it.

See "README" in /etc/grub.d

On Wed, Aug 31, 2016 at 11:51 PM, Kevin Wilson <wkevils@gmail.com> wrote:
Hi all,
I have several machines in my lab, all of them running Fedora.
Some of the have both SSD and non SSD drivers.
Since the setup is dynamic (sometimes I transfer disks from machine to
machine), there are cases that the SSD drive is one machine is
disconnected/moved to a different machine, and the boot is done
from the other non SSD driver (on which also Fedora is installed).

Is there a way to know whether to boot was done from SSD or not ?
(I know I can try to read the product name of the device from which
boot was done, but in many cases this is not enough to know straight
away whether it is SSD or not.

Regards,
Kevin

is not
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