Thanks! Mounting those partitions works just fine now.

I had a thought it might be polkit related a while after I posted. I was reading through older posts but must have skipped that one as not being obvious to my problem.

Hi! Long time Linux user (started with Slackware over 20 years ago, been mostly a Debian user since 1999) but a new Salix OS user. Well done! I've been getting familiar with Salix on an additional partition on my laptop. The drive has four primary partitions, two are dedicated to a Devuan/Debian ins...