Has anyone considered the lean file system at all? On 25/09/2015 9:13 pm, "Eric Auer" <e.a...@jpberlin.de> wrote:
> > Hi Mercury, > > (note: 2 GB and one core are no problem even for DOS - but > for example 8 GB and several cores are supported by almost > nothing in DOS, as there are no nice DOS extenders for it) > > > I don't see where we need multitasking for NAS use. A program could be > > made to both handle incoming requests while serving data and doing other > > tasks, eliminating the need for a proper multitasking kernel. Even if > > You would still have to have several files and networking > connections open at the same time and preferably transfer > data from several files in parallel. In Linux, you can do > that with good performance, but DOS performance is limited > because your server must not do concurrent kernel calls. > > > that was the case, the bloat of the Linux kernel would > > make it prohibitive in certain applications. > > Give an example for that - Linux can even run as embedded > operating system on SD cards with built-in Wifi / WLAN :-) > I mean on tiny computers of the size of an actual SD card! > > > I will draw up a spec as I said when I get the time. After that, > > implementation is up to the rest of the community. We could just > > as easily go with FAT+ or not advance the filesystem at all. > > As far as I understand, you feel limited by the maximum file > size of 2 or maybe 4 GB and maximum disk size of 2 TB? Then > you may want to start with adding GPT support to the kernel. > > Another issue is that FAT32 has bad performance and that the > FAT way of doing LFN is rather ugly internally as well. Which > other improvements do you have in mind for your new format? > > > > And of course: Please really have a look at EXISTING formats > to avoid re-inventing the wheel. Maybe ext2/3/4 already has > what you need while allowing a relatively small driver, too? > > https://en.wikipedia.org/wiki/Comparison_of_file_systems#Limits > > https://en.wikipedia.org/wiki/FATX#Derivatives > (only FAT+ as used on some DR variants might be a bit useful) > > https://en.wikipedia.org/wiki/HFS_Plus#Linux > > https://en.wikipedia.org/wiki/Ext2 (ext3/ext4 are more complex) > > Even a more complete UDF implementation might be cool for flash > next to DVD: https://en.wikipedia.org/wiki/Universal_Disk_Format > > Plus some other filesystems which seemed "too licensed" or too > complex and too feature rich to me, so start reading as above. > For example ZFS & Btrfs are probably too comprehensive for DOS. > > For general FS inspiration, a Be File System book and overview: > > http://www.nobius.org/~dbg/ > http://arstechnica.com/open-source/news/2010/06/the-beos-filesystem.ars > > In short, I guess ext2 and HFS+ might be good choices for "being > the next filesystem to have improved free DOS drivers available"? > See also some already existing filesystem drivers for those two: > > http://www.catacombae.org/hfsexplorer/ > > http://www.ext2fsd.com/?page_id=2 which is downloadable from: > http://sourceforge.net/projects/ext2fsd/files/ > > http://uranus.chrysocome.net/linux/ext2ifs.htm > > http://www.ibiblio.org/filesystems/howto/Filesystems-HOWTO-6.html > ftp://sunsite.unc.edu/pub/Linux/system/filesystems/ext2/ > > Cheers, Eric > > > > PS: Level 3 of ISO9660 also sounds nice, do DOS drivers support it? > https://en.wikipedia.org/wiki/ISO_9660 > > PPS: Does anybody still have a new copy of the ext2 DOS "LTOOLS"? > The download is no longer available after 18 years due to EOL. The > http://www.ibiblio.org/pub/linux/utils/dos/ copy is old, from 2001. > > > > > ------------------------------------------------------------------------------ > _______________________________________________ > Freedos-devel mailing list > Freedos-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-devel >
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