I've read in many sources that Partition Boot Record/Record is written upon formatting a disk partition and contains machine code for bootstrapping specific OS. My question is how a formatting tool like DOS format command can write specific OS bootstrap while it only formats not installs...
As i know MBR is created when we partition the disk. According the the doc:
And here is my confusion. How can MBR contains a boot loader for the installed operating system while when we partition the disk there isn't any system installed yet?
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