Thanks for information............!!!
I carefully read the whole support pages of Seagate but not yet found where they mentioned that they will replace hard disk even with a single bad sector.
As u said you are working since 1995 when maximum was
540GB, please think again, as I am working in IT industry since 1990, and hv worked on 80MB hard disks (size: 8" diameter). And used XT machines too.
Anyways if u hv special links with hdd manufacturers plz let me.