What is a mbr disk?

A Master Boot Record (MBR) disk is a type of storage device partitioning scheme used in computers. It contains a boot loader and the partition table, which defines how the disk is divided into partitions. MBR disks support a maximum size of 2 TB and can have up to four primary partitions or three primary partitions and one extended partition. This format has largely been replaced by the GUID Partition Table (GPT) in modern systems, which allows for larger disks and more partitions.