did you unmount and then remount when you removed and replaced it? ----- Original Message ----- From: "David Yang" <dgyang@uiuc.edu> To: "Erik Mouw" <J.A.K.Mouw@its.tudelft.nl> Cc: <kernelnewbies@nl.linux.org> Sent: Thursday, March 28, 2002 5:21 PM Subject: Re: floppy disk > > Erik, osync doesn't seem to "synchronously" read the disk. It writes the > data immediately, but then if I eject the disk and put it back in with > new data, it reads the old data from the cache. > > David > > > ---- > David Yang > UIUC Electrical Engineering 2004 > http://www.ews.uiuc.edu/~dgyang > dgyang@uiuc.edu > > > On Fri, 29 Mar 2002, Erik Mouw wrote: > > > On Thu, Mar 28, 2002 at 04:51:17PM -0600, David Yang wrote: > > > Erik, I've taken a look at the mtools and it doesn't quite work for what I > > > need. I need a full featured version of DOS running atop Linux and mtools > > > still has UNIX style options, filenames etc (which is probably better, but > > > doesn't make it DOS). > > > > You know where you can find the source, go fix it. > > > > > Is there a way to rpevent the kernel from caching stuff from fd0? > > > David > > > > Yes, mount with -osync. > > > > > > Erik > > > > > On Thu, 28 Mar 2002, Erik Mouw wrote: > > > > > > > On Thu, Mar 28, 2002 at 11:48:39AM -0600, David Yang wrote: > > > > > Erik, thanks for the info. I took a look at the mtools and while it's > > > > > cool, I was looking for a lower-level solution. The problem is when the > > > > > disk is read in linux, it uses it's cached version rather than the updated > > > > > new version. Is there a way in the kernel to clear out this cache? (some > > > > > dentry or inode code?) > > > > > > > > Mount with -osync. > > > > > > > > Note: unless you're using a Mac or a Sun, you *really* want to use > > > > mtools. The kernel doesn't like a floppy disk that's removed while > > > > still being mounted (yes, users do such nasty things, even when they're > > > > told not to do so). Mtools has no problems with that, and it solves > > > > your cache problems at the same time. > > > > -- > > J.A.K. (Erik) Mouw, Information and Communication Theory Group, Faculty > > of Information Technology and Systems, Delft University of Technology, > > PO BOX 5031, 2600 GA Delft, The Netherlands Phone: +31-15-2783635 > > Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl > > WWW: http://www-ict.its.tudelft.nl/~erik/ > > -- > > Kernelnewbies: Help each other learn about the Linux kernel. > > Archive: http://mail.nl.linux.org/kernelnewbies/ > > FAQ: http://kernelnewbies.org/faq/ > > > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
