HOW TO RESET SMART in drives
With specific Data Recovery machinery like Acelab, Atola, DFL, MRT, you can reset SMART tables and logs.
No sense in doing that though,
unless you aren't doing some low level data recovery task which does require this reset.
Resetting SMARTs is like think to remove the cast in the leg of a leg broken two days ago. You repaired nothing ... you simply hide a HUGE problem.
The leg is still broken and "using it" will cause pain and further additional damages ... exactly like loosing forever your precious data
HDDs with any kind of bad SMART, including temperature, are drives which
- are seriously in trouble
- have worked in really worse conditions
in either the cases you are simply trying to kill yourself data leaving them on such problematic drive.
SMART as the acronym says, is the self monitoring system of the self drive healthiness.
One day it tells you the drive is going to die. The job is done, the drive should (must) be replaced.
At that point you have a blinking ringing HUGE WARNING ... now what? It is in your decisions.
ABOUT SMART REALLOCATED SECTORS
as written in a comment I have written in this thread,
SMART reallocated sectors count has nothing to do with G-List (firmware specific) in drives.
G-List is the reallocation map of hard drives and every manufacturer has its own G-List format.
It is a built-in mechanism in the drive's firmware, when a remap in the G-List happen, this is REGISTERED in the SMART table for reallocation counts.
SMART reallocated sectors and even worse pending sectors are simply registered in the SMART tables, they are simply part of the mechanism that makes the SMART predictive failure to work.
Note: It works as warning in the BIOS at boot or only if you have a daemon or a utility that do monitor the SMART status and warns you of eventual issues.
In fact it makes no difference that you have a (roughly) 1 billion sectors 500GB hdd or a 4 billions sectors 2TB, the SMART reallocation table has only 200 or 250 sectors.
... 200/250 , sometime 100, aren't they too few for so many billions of LBAs ?
So I would make a modification to the accepted reply since it makes to think that you can repair a failed drive ... the drive is FAILED you CAN'T FIX IT ,
you must take the SMART warning for what it is ... and replace the drive
Many of the unrecoverable drives that we receive, have been KILLED by such utilities mostly for the simple reason that a failing drive, needing to be kept TURNED OFF, has been massacred by an absolutely USELESS repair (killing) process
CTO @ https://www.recuperodati299euro.it