Comment 6 for bug 2065315

Good morning
I was worried because I read

 Unknown kernel command line parameters "persistent splash BOOT_IMAGE=/casper/vmlinuz", will be passed to user space.
May 09 13:42:42 ubuntu kernel: persistent

My live USB is like that

a@b:~$ lsblk -fe7 /dev/sdd
NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINTS
sdd
├─sdd1 vfat FAT32 USBUNET 72EE-4CCC 219,9M 96% /media/a/USBUNET
├─sdd2 ext4 1.0 casper-rw 06f20fd7-c411-4aa5-be02-7b11934f71b9 7,1G 4% /media/a/casper-rw
└─sdd3 exfat 1.0 USBEXFAT F6BD-F745 660,9M 0% /media/a/USBEXFAT
a@b:~$

I don't know if this partition should mount automatically or if it's up to me to mount it. If yes, how?

The DF command did not list this partition as mounted.

THANKS