HFS Plus

E6431

file system journaling file system proprietary software technology

HFS Plus is a proprietary journaling file system developed by Apple for use in macOS and earlier Macintosh operating systems, succeeding the original HFS to support larger files and volumes.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (5)

Label	Occurrences
HFS+	10
HFS Plus canonical	3
HFS+ file system	1
Hierarchical File System	1
Mac OS Extended	1

How this entity was disambiguated

This entity first appeared as the object of triple T72859 — 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: HFS Plus
Context triple: [Apple Macintosh computers, fileSystem, HFS Plus]

A. IEEE 1394
IEEE 1394 is a high-speed serial bus interface standard, commonly known as FireWire, used for real-time data transfer between digital devices such as computers, cameras, and audio/video equipment.
B. Xanadu hypertext system
The Xanadu hypertext system is an early, visionary hypertext project conceived by Ted Nelson that aimed to create a universal, bidirectionally linked, non-destructive document publishing and versioning system.
C. USBOS
USBOS is the UN/LOCODE identifier assigned to the Port of Boston in the United States for international shipping and logistics.
D. Classic Mac OS
Classic Mac OS is the original graphical operating system for Apple’s Macintosh computers, known for its intuitive interface, single-tasking roots, and evolution from System 1 through Mac OS 9 before being replaced by macOS.
E. ATA
ATA (Advanced Technology Attachment), commonly known as IDE, is a standard interface used to connect storage devices like hard drives and optical drives to a computer's motherboard.
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: HFS Plus
Target entity description: HFS Plus is a proprietary journaling file system developed by Apple for use in macOS and earlier Macintosh operating systems, succeeding the original HFS to support larger files and volumes.

A. IEEE 1394
IEEE 1394 is a high-speed serial bus interface standard, commonly known as FireWire, used for real-time data transfer between digital devices such as computers, cameras, and audio/video equipment.
B. Xanadu hypertext system
The Xanadu hypertext system is an early, visionary hypertext project conceived by Ted Nelson that aimed to create a universal, bidirectionally linked, non-destructive document publishing and versioning system.
C. USBOS
USBOS is the UN/LOCODE identifier assigned to the Port of Boston in the United States for international shipping and logistics.
D. Classic Mac OS
Classic Mac OS is the original graphical operating system for Apple’s Macintosh computers, known for its intuitive interface, single-tasking roots, and evolution from System 1 through Mac OS 9 before being replaced by macOS.
E. ATA
ATA (Advanced Technology Attachment), commonly known as IDE, is a standard interface used to connect storage devices like hard drives and optical drives to a computer's motherboard.
F. None of above. chosen

Statements (58)

Predicate	Object
instanceOf	file system ⓘ journaling file system ⓘ proprietary software technology ⓘ
alsoKnownAs	HFS Plus ⓘ surface form: HFS+ HFS Plus ⓘ surface form: Mac OS Extended
backwardCompatibility	partial with HFS ⓘ
blockAllocationStructure	B-tree ⓘ
caseSensitivityDefault	case-insensitive ⓘ
caseSensitivityVariant	HFSX (case-sensitive HFS Plus) ⓘ
countryOfOrigin	United States of America ⓘ surface form: United States
defaultFileSystemOf	Mac OS 8 ⓘ surface form: Mac OS 8.1 Mac OS 9 ⓘ Mac OS X 10.0 Cheetah ⓘ surface form: Mac OS X 10.0 macOS ⓘ surface form: macOS Sierra
designedFor	larger files ⓘ larger volumes ⓘ
developer	Apple Inc. ⓘ
directoryStructure	B-tree ⓘ
fileNameEncoding	UTF-16 ⓘ
introduced	1998 ⓘ
introducedIn	Mac OS 8 ⓘ surface form: Mac OS 8.1
license	proprietary ⓘ
maximumFileSize	8 exabytes (theoretical) ⓘ
maximumVolumeSize	8 exabytes (theoretical) ⓘ
metadataStorage	allocation file ⓘ attributes file ⓘ catalog file ⓘ extents overflow file ⓘ startup file ⓘ
operatingSystem	Mac OS 8 ⓘ Mac OS 9 ⓘ macOS ⓘ surface form: Mac OS X macOS ⓘ
optimizedFor	classic Mac OS metadata model ⓘ
predecessor	MFS ⓘ surface form: HFS
replacedAsDefaultBy	APFS ⓘ
replacedAsDefaultIn	macOS ⓘ surface form: macOS High Sierra
replacedBy	APFS ⓘ
status	legacy file system in modern macOS ⓘ
supports	POSIX permissions ⓘ
supportsBooting	yes on Intel-based Macs ⓘ yes on PowerPC-based Macs ⓘ
supportsFeature	Unicode file names ⓘ access control lists ⓘ case-insensitive file names ⓘ extended attributes ⓘ file system compression ⓘ hard links ⓘ hot file clustering ⓘ journaling ⓘ long file names ⓘ optional case-sensitive variant ⓘ resource forks ⓘ symbolic links ⓘ volume journaling ⓘ
usedOn	external storage devices for macOS ⓘ internal hard drives of Macintosh computers ⓘ
usesAllocationBlockSize	variable ⓘ

How these facts were elicited

Referenced by (16)

Full triples — surface form annotated when it differs from this entity's canonical label.

Apple Macintosh computers → fileSystem → HFS Plus ⓘ

Classic Mac OS → defaultFileSystem → HFS Plus ⓘ

macOS → supportsFileSystem → HFS Plus ⓘ