If the OP thinks resetting the SMART will magically make bad sectors
become good, he is wrong. There are 2 lists: P and g lists. The P list
is the primary list for sector found bad at time of manufacture. The g
list are those sectors that became bad later and got remapped. The P
list cannot be changed. Resetting SMART would reset to zero the
remapped count in the g list (of sectors found bad after manufacture).
Wiping the data doesn't restore bad sectors. Just means they will have
to get remapped again with possible data loss until that happens.
Wonder if the OP is trying to resell his old hard disk on eBay while
faking the count of remapped bad sectors (reallocated sector count) to
make it look much better than it is. It won't do him any good since bad
stays bad. It's like when car roll back the odometer. Seagates are the
ones where SMART can be reset using a UART (e.g., Kootek PL2303 USB to
Serial TTL UART Module Converter Adapter). Other brands require gear
costing $2K. The OP already mentioned eBay. Probably is where he
intends to dump his crap disk. Makes no mention why he wants to reset
SMART data. Now he'll probably come up with a story.