Recent content by s-e-b-a

Do all hard disks have HPA and DCO? If not, does it depend on the kind of disk or does it depend on the manufacturer?

I bought a second hand laptop and was in the process of cleaning and resetting the hard disk until it started asking for a password and doesn't let me get to the BIOS anymore and also doesn't let me boot from a USB. Everything was working fine for last few days. The laptop came with Windows. I...