Definition of MBR & how to fix missing or corrupt MBRs A master boot record (often shortened as MBR) is a kind of boot sector stored on a hard disk drive or other storage device that contains the ...
Gigabyte GA-970A-D3P Rev 2 older MB (2016) AMD based system. Main drive; 250GB SSD W7 Pro x64 MBR no hidden partitions Backup; brand new 4TB same O/S GPT one created System partition using Disk Part .