Master Boot Record
E707759
The Master Boot Record is a special boot sector located at the beginning of a storage device that contains the partition table and initial code used to start a computer’s operating system.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
boot sector
ⓘ
data structure ⓘ partitioning scheme component ⓘ |
| alsoKnownAs | MBR NERFINISHED ⓘ |
| bootProcessStep |
executed by BIOS after POST
ⓘ
loads volume boot record of active partition ⓘ |
| bootSignatureValue | 0x55AA ⓘ |
| canBeRepairedBy |
bootrec /fixmbr
ⓘ
fdisk /mbr ⓘ |
| compatibleWith | BIOS-based systems ⓘ |
| contains |
boot signature
ⓘ
bootloader code ⓘ disk signature ⓘ partition table ⓘ |
| contrastedWith | GUID Partition Table NERFINISHED ⓘ |
| fileSystemAgnostic | true ⓘ |
| hasSection |
boot signature area
ⓘ
bootstrap code area ⓘ partition table area ⓘ |
| hasSize | 512 bytes ⓘ |
| introducedBy | IBM NERFINISHED ⓘ |
| introducedIn | 1983 ⓘ |
| introducedWith | IBM PC DOS 2.0 NERFINISHED ⓘ |
| lessCompatibleWith | UEFI-based systems ⓘ |
| locatedAt |
first sector of a storage device
ⓘ
logical block address 0 ⓘ |
| maximumAddressableDiskSize | 2 TB with 512-byte sectors ⓘ |
| partitionEntryAddressing |
CHS
ⓘ
LBA ⓘ |
| partitionTableEntryCount | 4 ⓘ |
| partitionTableEntrySize | 16 bytes ⓘ |
| partitionTableOffset | byte 446 ⓘ |
| standardizedIn | IBM PC-compatible architecture NERFINISHED ⓘ |
| supports |
extended partition
ⓘ
up to four primary partitions ⓘ |
| usedBy |
BIOS firmware
ⓘ
BSD operating systems ⓘ Linux NERFINISHED ⓘ MS-DOS NERFINISHED ⓘ Windows NERFINISHED ⓘ |
| usedFor |
bootstrapping operating system
ⓘ
defining disk partitions ⓘ locating active partition ⓘ |
| usedOn |
hard disk drive
ⓘ
removable storage device ⓘ solid-state drive ⓘ |
| vulnerableTo |
boot sector viruses
ⓘ
corruption ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.