skdump does not correctly recognize external hard drives

[hacker-h]

External hard drives appear to be not supported:

sudo skdump /dev/sdb

Device: sat12:/dev/sdb
Type: 12 Byte SCSI ATA SAT Passthru
Size: 9537504 MiB
Awake: Operation not supported
ATA SMART not supported.

despite being SMART capable:

$ sudo smartctl --info /dev/sdb

smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-65-generic] (local build)
...
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

The reason for this errorful assumption of skdump is probably that external hard drives do not support the Awake operation, since spinning up and down is entirely handled by the chip within the external case itself.