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osdev>Benlunt

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Line 1: {{Filesystems}} There are several filesystems existing that are abbreviated '''SFS''', but the one discussed here is athe '''Simple File System''' ~~filesystem~~ by Brendan Trotter, designed to be very easy to implement. It has a minimal set of features. Officially it is still in its draft stage, but hasn't changed ~~over the~~for ~~past~~some ~~year~~time. SFS is designed to be used as a simple filesystem for use on floppy disks and other removable media to transfer data between computers. Line 9: There are five key areas in a SimpleFS partition: The Super-block, Reserved Area, Data Area, Free Area and Index Area. === Super-block === The Super-block is located in the first sector of a disk or partition. For floppy disks that means it is contained in the boot sector. The superblock contains structural information about the partition. The SFS data of the super-block is located at offset ~~0x194~~0x0194 and is 58 bytes long, leaving space for boot code and a partition table. {\| class="wikitable" {\| \|- ! Offset Line 16: ! Contents \|- \| ~~0x194~~0x0194 \| 8 \| Last alteration time of super-block values (Data size or Index Size) Line 69: The "first" (at the end of the disk) entry must be a Volume Identifier entry, this is used to detect if a disk has been swapped when auto-detection is unavailable. The "last" (closest to the start of the disk) must be a Starting Marker entry, this is used for file-system recovery if the super-block is damaged. Continuation entries are used to allow longer file names than can be placed in a single directory or file entry and immediately precede their respective file/directory entry. === Embedding === The GUID currently in use for GPT partitions is 4ebf0e06-11bf-450c-1a06-534653534653 == Information Formatting == Line 81 ⟶ 84: * [[Topic:11833\|SFS Review thread]] === External Links === * [https://www.d-rift.nl/combuster/vdisk/sfs.html Official Specification] ([https://web.archive.org/web/20090923015653/http://dimensionalrift.homelinux.net/combuster/vdisk/sfs.html ~~Official Specification~~web.archive.org]) * [~~http~~https://~~dimensionalrift~~www.~~homelinux~~d-rift.~~net~~nl/combuster/vdisk/ A windows utility for SFS images] ([https://web.archive.org/web/20111111113756/http://dimensionalrift.homelinux.net/combuster/vdisk/ web.archive.org]) * [https://www.fysnet.net/blog/files/sfs.pdf Ben Lunt's specification] (updated 13 Jan 2022) (not 100% compatible with the original, has more features) (version 1.10) [[Category:Filesystems]] [[de:SFS]]