After a disk checkup, I found out that something is wrong with my 'reallocated sector count' & 'current pending sector count'. The values are as follows:
Reallocated Sectors Count ~ 1(current), 1(worst), 10(threshold), 00000001CDB0(raw values)
Current Pending Sector Count ~ 100(current), 100(worst), 0(threshold), 00000000003D(raw vales)
Reallocated Sectors Count ~ 1(current), 1(worst), 10(threshold), 00000001CDB0(raw values)
Current Pending Sector Count ~ 100(current), 100(worst), 0(threshold), 00000000003D(raw vales)