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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Master Boot Record canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T8022588 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Master Boot Record Context triple: [NTLDR, readsFrom, Master Boot Record]
-
A.
BIOS Parameter Block
The BIOS Parameter Block is a data structure in a disk’s boot sector that defines the volume’s layout and filesystem parameters, such as sector size, cluster size, and file allocation table details.
-
B.
ROM BIOS
ROM BIOS is the built-in firmware in early IBM PCs that initializes hardware and provides low-level services for loading and running operating systems.
-
C.
BIOS
BIOS is the working title for a science fiction film project initially developed under that name before being released as "Finch," starring Tom Hanks as a lone survivor in a post-apocalyptic world who builds a robot to care for his dog.
-
D.
Windows Boot Manager
Windows Boot Manager is a Microsoft utility that initializes and selects installed operating systems during the startup process on Windows-based computers.
-
E.
Boot Record Volume Descriptor
Boot Record Volume Descriptor is a special ISO 9660 volume descriptor type that provides boot-related information enabling systems to start (boot) from an optical disc.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Master Boot Record Target entity description: 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.
-
A.
BIOS Parameter Block
The BIOS Parameter Block is a data structure in a disk’s boot sector that defines the volume’s layout and filesystem parameters, such as sector size, cluster size, and file allocation table details.
-
B.
ROM BIOS
ROM BIOS is the built-in firmware in early IBM PCs that initializes hardware and provides low-level services for loading and running operating systems.
-
C.
BIOS
BIOS is the working title for a science fiction film project initially developed under that name before being released as "Finch," starring Tom Hanks as a lone survivor in a post-apocalyptic world who builds a robot to care for his dog.
-
D.
Windows Boot Manager
Windows Boot Manager is a Microsoft utility that initializes and selects installed operating systems during the startup process on Windows-based computers.
-
E.
Boot Record Volume Descriptor
Boot Record Volume Descriptor is a special ISO 9660 volume descriptor type that provides boot-related information enabling systems to start (boot) from an optical disc.
- F. None of above. chosen
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 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Master Boot Record Description of subject: 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.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.