Mounting an internally installed disk on a laptop spins up all disks connected to this machine via USB. And I try to prevent these externally connected disks to spin up.

The behaviour, IIRC, started a few months ago on the previous F27 and continues now on F28. Before that I don't remember this behaviour to have happened.

I thought it was some smartd issue, and stopped this service ("/usr/bin/systemctl stop smartd.service") - to no avail: mounting the internal disk still spins up the external ones.

The internal disk is identified by "smartctl -d test /dev/sda" like so:

[ ... ] /dev/sda: Device of type 'scsi' [SCSI] detected /dev/sda [SAT]: Device open changed type from 'scsi' to 'sat' /dev/sda [SAT]: Device of type 'sat' [ATA] opened

(On a side note: I'm astonished that a smartctl simple info flag is changing some device type like shown above)

External disks are identified by a smartctl test like so:

One: "[USB Sunplus]: Device of type 'usbsunplus' [ATA] detected"

the other one: "[SAT]: Device of type 'sat' [ATA] detected"

Anyone an idea about where to start investigating this issue? Where could such behaviour possibly be set up?

Thanks in anticipation.

Wolfgang