[smartmontools-support] Reports Health Status OK? But No SMART Support Available?

[Dachshund Digital]

Have an old IDE drive in an older USB 2 disk enclosure, of course this 
is not SATA, so no surprise it is not SMART capable.  But how can 
smartctl report health OK if no SMART?  Is it just the fact that the 
disk controller responded, that the assumption is the disk is healthy?

# smartctl -H /dev/sdi1
smartctl 7.2 2020-12-30 r5155 [aarch64-linux-5.10.103-v8+] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SMART Health Status: OK

# smartctl -i /dev/sdi1
smartctl 7.2 2020-12-30 r5155 [aarch64-linux-5.10.103-v8+] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Vendor:               WDC
Product:              WD400BB-60CJA0-2
Revision:             16.0
User Capacity:        40,020,664,320 bytes [40.0 GB]
Logical block size:   512 bytes
Rotation Rate:        5400 rpm
Device type:          disk
Local Time is:        Tue Mar 15 18:50:33 2022 UTC
SMART support is:     Unavailable - device lacks SMART capability.

# smartctl -P show -x /dev/sdi1
smartctl 7.2 2020-12-30 r5155 [aarch64-linux-5.10.103-v8+] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Vendor:               WDC
Product:              WD400BB-60CJA0-2
Revision:             16.0
User Capacity:        40,020,664,320 bytes [40.0 GB]
Logical block size:   512 bytes
Rotation Rate:        5400 rpm
Device type:          disk
Local Time is:        Tue Mar 15 18:50:36 2022 UTC
SMART support is:     Unavailable - device lacks SMART capability.
Read Cache is:        Enabled
Writeback Cache is:   Enabled

=== START OF READ SMART DATA SECTION ===
Current Drive Temperature:     0 C
Drive Trip Temperature:        0 C

Elements in grown defect list: 0

Error Counter logging not supported

Device does not support Self Test logging
Device does not support Background scan results logging