Advanced Disc Filing System (original) (raw)
The Advanced Disc Filing System (ADFS) is a computing file system unique to the Acorn computer range and RISC OS-based successors. Initially based on the rare Acorn Winchester Filing System, it was renamed to the Advanced Disc Filing System when support for floppy discs was added (using a WD1770 floppy disc controller) and on later 32-bit systems a variant of a PC-style floppy controller. The BBC Master Compact contained ADFS version 2.0, which provided the addition of format, verify and backup commands in ROM, but omitted support for hard discs.
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|---|---|
| dbo:abstract | The Advanced Disc Filing System (ADFS) is a computing file system unique to the Acorn computer range and RISC OS-based successors. Initially based on the rare Acorn Winchester Filing System, it was renamed to the Advanced Disc Filing System when support for floppy discs was added (using a WD1770 floppy disc controller) and on later 32-bit systems a variant of a PC-style floppy controller. Acorn's original Disc Filing System was limited to 31 files per disk surface, 7 characters per file name and a single character for directory names, a format inherited from the earlier Atom and System 3–5 Eurocard computers. To overcome some of these restrictions Acorn developed ADFS. The most dramatic change was the introduction of a hierarchical directory structure. The filename length increased from 7 to 10 letters and the number of files in a directory expanded to 47. It retained some superficial attributes from DFS; the directory separator continued to be a dot and $ now indicated the hierarchical root of the filesystem. ^ was used to refer to the parent directory, @ the current directory, and \ was the previously-visited directory. The BBC Master Compact contained ADFS version 2.0, which provided the addition of format, verify and backup commands in ROM, but omitted support for hard discs. (en) Das Advanced Disc Filing System (ADFS) ist ein Dateisystem, das von der Firma Acorn für ihr Betriebssystem RISC OS entwickelt wurde. Im Gegensatz zum älteren Disc File System (DFS) des RISC-OS-Vorgängers Arthur hat es keine Probleme mehr mit Fragmentierung. Es unterstützt Dateinamen mit bis zu 10 Zeichen Länge und maximal 77 Dateien in einem Verzeichnis. Es war anfangs auf 3,5''-Disketten mit einer Kapazität von 640k beschränkt, wurde später jedoch auch auf 800k-Double-Density- und 1600k-High-Density-Disketten erweitert. In der aktuellen Version von ADFS gibt es so gut wie keine Begrenzung der Zeichen im Dateinamen und Anzahl der Dateien pro Verzeichnis mehr. Unter Linux lässt sich dieses Dateisystem problemlos mounten. (de) Advanced Disc Filing System (ADFS) — файловая система, использовавшаяся на компьютерах Acorn Computers, в операционной системе RISC OS и её потомках. Изначально базировалась на редко используемой Acorn Winchester Filing System, которая была переименована в Advanced Disc Filing System, когда в неё была добавлена поддержка флоппи-дисков (с использованием контроллера WD1770). Оригинальная ФС Acorn, (DFS), позволяла сохранить лишь небольшое количество файлов на диск, имена же каталогов и файлов были ограничены 1 и 7 символами соответственно. Эти ограничения отчасти были вызваны тем, что Disk Filing System была основана на дисковой прошивке, используемой в ранних компьютерах Acorn Atom и System 3-5 Eurocard. Чтобы преодолеть эти ограничения, Acorn разработала ADFS. Наиболее значительным изменением стал переход к иерархической структуре каталогов. Максимальная длина имени файла была увеличена до 10 символов, и максимально возможное количество файлов в каталоге увеличено до 47. Были сохранены внешние атрибуты DFS; разделителем каталогов продолжала быть точка, а знак $ стал обозначать корень файловой системы. ^ использовался для обозначения родительского каталога, а \ — последний посещённый каталог. (ru) |
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| dbp:attributes | Load address, execute address and file cycle number ; File type and modification time ; User read/write/execute-only; public read/write/execute-only; Deletion lock (en) |
| dbp:badBlocksStruct | none , marked in bitmap (en) |
| dbp:compression | No (en) |
| dbp:dateRange | 0001-01-01 (xsd:gMonthDay) |
| dbp:dateResolution | 10 ms (en) |
| dbp:datesRecorded | Modification (en) |
| dbp:developer | Hugo Tyson, Nick Reeves (en) |
| dbp:directoryStruct | Hierarchical fixed-length tables (en) |
| dbp:encryption | No (en) |
| dbp:fileStruct | One range per file plus table of free-space ranges , bitmap with embedded file IDs (en) |
| dbp:fileSystemPermissions | None (en) |
| dbp:filenameCharacterSet | ASCII , (en) |
| dbp:forksStreams | no (en) |
| dbp:fullName | Advanced Disc Filing System (en) |
| dbp:introductionOs | dbr:Acorn_MOS |
| dbp:maxFileSize | 512 MB (en) |
| dbp:maxFilenameSize | 10 (xsd:integer) |
| dbp:maxFilesNo | 47 (xsd:integer) |
| dbp:maxVolumeSize | 512 MB (en) |
| dbp:name | ADFS (en) |
| dbp:os | dbr:Acorn_MOS dbr:RISC_OS |
| dbp:partitionId | or (en) |
| dbp:singleInstanceStorage | No (en) |
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| dct:subject | dbc:Disk_operating_systems dbc:Acorn_Computers dbc:RISC_OS dbc:Disk_file_systems |
| gold:hypernym | dbr:System |
| rdf:type | yago:WikicatComputerFileSystems yago:Abstraction100002137 yago:Arrangement105726596 yago:ClassificationSystem105727220 yago:Cognition100023271 yago:FileSystem105732614 yago:PsychologicalFeature100023100 yago:Structure105726345 yago:WikicatDiskFileSystems |
| rdfs:comment | The Advanced Disc Filing System (ADFS) is a computing file system unique to the Acorn computer range and RISC OS-based successors. Initially based on the rare Acorn Winchester Filing System, it was renamed to the Advanced Disc Filing System when support for floppy discs was added (using a WD1770 floppy disc controller) and on later 32-bit systems a variant of a PC-style floppy controller. The BBC Master Compact contained ADFS version 2.0, which provided the addition of format, verify and backup commands in ROM, but omitted support for hard discs. (en) Das Advanced Disc Filing System (ADFS) ist ein Dateisystem, das von der Firma Acorn für ihr Betriebssystem RISC OS entwickelt wurde. Im Gegensatz zum älteren Disc File System (DFS) des RISC-OS-Vorgängers Arthur hat es keine Probleme mehr mit Fragmentierung. Es unterstützt Dateinamen mit bis zu 10 Zeichen Länge und maximal 77 Dateien in einem Verzeichnis. Es war anfangs auf 3,5''-Disketten mit einer Kapazität von 640k beschränkt, wurde später jedoch auch auf 800k-Double-Density- und 1600k-High-Density-Disketten erweitert. Unter Linux lässt sich dieses Dateisystem problemlos mounten. (de) Advanced Disc Filing System (ADFS) — файловая система, использовавшаяся на компьютерах Acorn Computers, в операционной системе RISC OS и её потомках. Изначально базировалась на редко используемой Acorn Winchester Filing System, которая была переименована в Advanced Disc Filing System, когда в неё была добавлена поддержка флоппи-дисков (с использованием контроллера WD1770). (ru) |
| rdfs:label | Advanced Disc Filing System (en) Advanced Disc Filing System (de) Advanced Disc Filing System (ru) |
| owl:sameAs | freebase:Advanced Disc Filing System yago-res:Advanced Disc Filing System wikidata:Advanced Disc Filing System dbpedia-de:Advanced Disc Filing System dbpedia-ru:Advanced Disc Filing System https://global.dbpedia.org/id/3WFcx |
| prov:wasDerivedFrom | wikipedia-en:Advanced_Disc_Filing_System?oldid=1117475403&ns=0 |
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