Macintosh File System
| MFS | |
|---|---|
| Manufacturer | Apple computer |
| Full name | Macintosh File System |
| Initial release | January 24, 1984 ( System 1 ) |
| Partition identifier |
Apple_MFS( APM )
|
| Technical implementation | |
| Directories | table |
| Files | Chained list |
| Defect block list | No |
| Maximum values | |
| Size of a file | 20 MiB |
| Number of all files | 4,094 |
| Length of the file name | 255 characters |
| File system size | 20 MiB |
| Allowed characters in the file name | according to the character set table used , e.g. B. MacRoman |
| properties | |
| Dates of a file | Generation, change |
| Date range | January 1, 1904 - February 6, 2040 |
| Forks | 2: data and resource |
| File attributes | version, locked, type, creator, Finder window, location in Finder window, Finder flags |
| File rights management | No |
| Transparent compression | No |
| Transparent encryption | No |
| Supporting operating systems |
System or Mac OS ↳ System 1- 7.6 r+w↳ Mac OS 7.6.1 - 8.0 rMac OS X ↳ MFSLives r
|
The Macintosh File System (MFS), in German Macintosh file system, is a file system developed by Apple for 400K disks for the Macintosh 128k . It was introduced in January 1984 along with the original Macintosh model and the " System " operating system .
history
System 1 had a limitation in the management of its directory structure which was 128 documents and 128 directories. The Macintosh File System , MFS for short, was also designed for floppy disks and this limitation was therefore not a major limitation.
However , MFS was not suitable for the 1985 Macintosh XL , 1986 Macintosh SE, and 1987 Macintosh II that were shipped with a hard drive . As early as 1985 it was therefore replaced by the Hierarchical File System , or HFS for short, which was also suitable for hard drives.
Up to Mac OS 7.6 , which appeared in 1997, MFS was fully supported by the classic Mac OS (up to version 7.5.5 simply called “System” or “Macintosh System Software”). From version 7.6.1 of the classic Mac OS, due to various stability problems with write access, it can only be read in and with Mac OS 8.1 , released in 1998, support was finally completely removed. With the source code MFSLives published by Apple as an example of a VFS driver, MFS file systems can be read from Mac OS X version 10.4 “Tiger” .
See also
Web links
- MFSLives (English) - MFSLives is a VFS plug-in for Mac OS X 10.4 and newer that enables read access to MFS file systems.
Individual evidence
- ↑ a b Apple Developer: MFSLives (English), accessed on May 25, 2015
- ↑ Michael Palmers, Michael Walters: Networking - Guide to Operating Systems - Fourth Edition . Course Technology, 2011, ISBN 978-1-111-30636-6 , pp. 200 (English).
- ↑ System 7.6.1 Changes and Improvements - Drivers ( Memento of April 29, 1999 in the Internet Archive ) (English): Floppy: The ability to write to MFS disks has been disabled, as such writes often resulted in errors or system hangs. These disks are now read-only.