Hard Disk Monitoring

I was actually getting regular slow down's and freezing in my computer when used that HDD for Windows boot. Now i moved it as secondary and it seems little better, but shows only 15% health, i will try to Re-Initialize (regenerate0 with surface test, however its probably not safe to use anymore. How...

Hello, whats the meaning of dark green and light green sectors its just visual bug because my system was lagging when running test?

If i run ReInitiate disk surface test, will it show me where the bad sectors are or not?