@tulei:
In addition to the comments from
networks, to give accurate answers to your questions about your specific disk, would need information that you have not supplied (except to say that MHDD will not add LBAs to the P-list).
To give you an example of some of the complexity - just because those slower LBAs are no longer slow, does not mean that they were definitely reallocated by the drive at all. If you had the full raw SMART data from before & after you ran MHDD, then you could check whether the value of attribute 5 had increased.
tulei wrote:And if I used this hard disk a long time, does these erased block will appear again?
The exact meaning of an "erased block ... appear[ing] again" is not clear to me - I could guess at least 2 different interpretations. In any case, we can't know the future of your disk. Some answers would also depend on what caused your drive to have slow LBAs in the first place.
Don't rely on always getting a SMART warning before a drive fails, but as mentioned above, SMART
might give you a hint that there's a problem, which you otherwise would not know until it was too late. Make sure you keep backups
