So, after twonky 8.0.3 installation upgrade and new license applied.
Its all working, rescan interval default setting is at 90 minutes, I may change later.
Prior to the upgrade, i did clear the current db cache (rm * within the directory). It may that, the upgrade version created a new db cache and it never used the corrupted one.
The new version is much faster in terms of scanning, and its working fine.
Thanks for your help. While my mind is refreshed, I might be in the mood to further upgrade to 8.1.2 and upgrade samba v3.
I may even buy compatible WD disks to upgrade from 1 to 4 TB.