How to view SMART information on external seagate HDD?

I have two external seagate drives but I cannot view SMART information on them. I can view SMART information just fine on internal drivers and I can view SMART information from external drives using Windows either directly or passing through USB ports with those external drives to Windows VM.

The external drives are NTFS as they are sometimes used with Windows, have no hardware problems and are checked with chkdsk under Windows.

What do I need to do to be able to see the SMART information, preferably in the “Disks” KDE app or similar?

with gnome-disk the harddisks have to be unmounted, otherwise smart info is not available

But I can see SMART on the mounted internal drives, so it is not that.

Figured out to check the drive with smartctl via sudo smartctl --info /dev/sdd2 and here is the output:

Product:              Backup+ Hub BK
Revision:             D781
Compliance:           SPC-4
User Capacity:        4,000,787,029,504 bytes [4.00 TB]
Logical block size:   512 bytes
Physical block size:  4096 bytes
Logical Unit id:      0x5000000000000001
Device type:          disk
SMART support is:     Available - device has SMART capability.
SMART support is:     Disabled
Temperature Warning:  Disabled or Not Supported

I have attempted enabling smart via $ sudo smartctl --smart=on /dev/sdd2 but it is not working:

Informational Exceptions (SMART) disabled
Temperature warning disabled

disregard I didn’t see that you already tried what I suggested.

there is this from the arch wiki

You may need to specify a device type. For example, specifying --device=ata tells smartctl that the device type is ATA, and this prevents smartctl from issuing SCSI commands to that device

when issuing the sudo smartctl --smart=on /dev/sdd2 command

sudo smartctl -x -d auto /dev/sdX

Works for me,

I have tried specifying device to little result. I cannot enable smart with --smart=on regardless of what I use and -x -d auto outputs:

SMART Health Status: OK
Current Drive Temperature:     0 C
Drive Trip Temperature:        0 C

Error Counter logging not supported

Device does not support Self Test logging
Device does not support Background scan results logging
Device does not support General statistics and performance logging

which seems incomplete so I am not sure if I should even believe the health status it writes.