From mboxrd@z Thu Jan 1 00:00:00 1970 From: jnc@mercury.lcs.mit.edu (Noel Chiappa) Date: Tue, 21 Feb 2017 16:49:13 -0500 (EST) Subject: [TUHS] Mach for i386 / Mt Xinu or other Message-ID: <20170221214913.1843B18C117@mercury.lcs.mit.edu> > From: Larry McVoy > The DOS file system, while stupid, was very robust in the face of > crashes I'm not sure it's so much the file system (in the sense of the on-disk format), as how the system _used_ it (although I suppose one could consider that part of the FS too). The duplicated FAT, and the way file sectors are linked using it, is I suppose a little more robust than other designs (e.g. the way early Unixes did it, with indirect blocks and free lists), but I think a lot of it must have been that DOS wrote stuff out quickly (as opposed to e.g. the delayed writes on early Unix FS's, etc). That probably appoximated the write-ordering of more designed-robust FS's. Noel