A Master Boot Record (MBR) is a special type of boot sector at the very beginning of partitioned computer mass storage devices like fixed disks or removable drives intended for use with IBM PC-compatible systems and beyond. The MBR holds the information on how the logical partitions, containing file systems, are organized on that medium. Besides that, the MBR functions as an operating system independent chain boot loader in conjunction with each partition's Volume Boot Record (VBR).
MBRs are not present on non-partitioned media like floppies, superfloppies or other storage devices configured to behave as such.
The concept of MBRs was introduced in 1983. With storage volumes now commonly exceeding 2 TB, it has become a limiting factor in the 2010s. The MBR partitioning scheme is therefore in the process of being superseded by the GUID Partition Table (GPT) scheme in new computers. A GPT can coexist with a MBR in order to provide some limited form of backward compatibility for older systems.
Famous quotes containing the words master, boot and/or record:
“Man has demonstrated that he is master of everythingexcept his own nature.”
—Henry Miller (18911980)
“... until the shopkeeper plants his boot in our eyes,
and unties our bone and is finished with the case,
and turns to the next customer, forgetting our face
or how we knelt at the yellow bulb with sighs
like moth wings for a short while in a small place.”
—Anne Sexton (19281974)
“All photographs are there to remind us of what we forget. In thisas in other waysthey are the opposite of paintings. Paintings record what the painter remembers. Because each one of us forgets different things, a photo more than a painting may change its meaning according to who is looking at it.”
—John Berger (b. 1926)