thanks for a quick answer but 8 pending sectors are not what I'm worried about, after googling the [C6] Uncorrectable Sector Count: 8 seems to be more serious of a concern.8 pending sectors - isn't too much.
Can be fixed with mhdd (scan with relocate on) or Victoria software.
But those Seagate DM001 drives have rather high failure rates.
Critical_structure_corruption BSODs and pending sectors on secondary drive are not necessary related.
Check suggestions here:
https://softwarekeep.com/help-cente...ical-structure-corruption-error-on-windows-10