I think I've figured it out - here's a script(1) of trying to mount a write-protected floppy:
[EMAIL PROTECTED] # uname -sr FreeBSD 4.8-RELEASE [EMAIL PROTECTED] # mount /dev/fd0 /mnt [EMAIL PROTECTED] # ll /mnt total 3 drwxr-xr-x 2 root wheel 512 Jun 28 14:04 . drwxr-xr-x 21 root wheel 512 May 19 18:57 .. [EMAIL PROTECTED] # umount /mnt umount: unmount of /mnt failed: Input/output error However, here's the vidcontrol(1) dump of the same commands: [EMAIL PROTECTED] # uname -sr FreeBSD 4.8-RELEASE [EMAIL PROTECTED] # mount /dev/fd0 /mnt fd0c: hard error writing fsbn 240 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 6 hd 1 sec 7) [EMAIL PROTECTED] # ll /mnt total 3 drwxr-xr-x 2 root wheel 512 Jun 28 14:04 . drwxr-xr-x 21 root wheel 512 May 19 18:57 .. [EMAIL PROTECTED] # umount /mnt fd0c: hard error writing fsbn 56 of 56-63 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 1 hd 1 sec 3) fd0c: hard error writing fsbn 240 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 6 hd 1 sec 7) fd0c: hard error writing fsbn 240 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 6 hd 1 sec 7) fd0c: hard error writing fsbn 16 of 16-18 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 0 hd 0 sec 17) fd0c: hard error writing fsbn 56 of 56-63 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 1 hd 1 sec 3) fd0c: hard error writing fsbn 16 of 16-18 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 0 hd 0 sec 17) fd0c: hard error writing fsbn 56 of 56-63 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 1 hd 1 sec 3) fd0c: hard error writing fsbn 240 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 6 hd 1 sec 7) fd0c: hard error writing fsbn 16 of 16-18 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 0 hd 0 sec 17) fd0c: hard error writing fsbn 56 of 56-63 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 1 hd 1 sec 3) fd0c: hard error writing fsbn 240 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 6 hd 1 sec 7) fd0c: hard error writing fsbn 16 of 16-18 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 0 hd 0 sec 17) fd0c: hard error writing fsbn 56 of 56-63 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 1 hd 1 sec 3) fd0c: hard error writing fsbn 240 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 6 hd 1 sec 7) fd0c: hard error writing fsbn 16 of 16-18 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 0 hd 0 sec 17) umount: unmount of /mnt failed: Input/output error Since I'm doing this on ttyv0, I see the errors on the console - but they don't appear in the typescript. I'm guessing that you're doing this in a non-console shell, and the errors are appearing elsewhere - maybe /var/log/messages? ----- Original Message ----- From: "Rob Lahaye" <[EMAIL PROTECTED]> Subject: Re: mount & umount read-only floppy: unmount failed: Input/output error ?? > > Rob wrote: > > That's strange - I get errors as soon as I try and do this, before the > > filesystem is even available. > > > > Perhaps the updates from mounting the floppy aren't being written out to > > the actual media until you try to unmount it - some kind of caching > > issue? > > > > What happens if you try to touch a file on the (incorrectly) writeable > > floppy? > > Are you also using FreeBSD 4.8? > > I have created the installation floppy from the kern.flp file. > I then made this floppy readonly. I put that into my floppy drive > and... > > # mount -t ufs /dev/fd0 /mnt > # ls -lo /mnt > total 1301 > drwxr-xr-x 2 root wheel - 512 Apr 3 20:06 boot > -r-xr-xr-x 1 root wheel - 1324900 Apr 3 20:06 kernel.gz > # touch /mnt/kernel.gz > # ls -lo /mnt > total 1301 > drwxr-xr-x 2 root wheel - 512 Apr 3 20:06 boot > -r-xr-xr-x 1 root wheel - 1324900 Jun 30 19:17 kernel.gz > # umount /mnt > umount: unmount of /mnt failed: Input/output error > # > > Notice that the time has changed due to the 'touch' of the file > despite being readonly!! > > The very little I know about filesystems, I guess the 'touch' has > been applied to the cache, not to the actual floppy. > The umount forces a sync, which can't be done due to readonly. > > Something is fishy here, isn't it? > > Rob. > > _______________________________________________ > [EMAIL PROTECTED] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "[EMAIL PROTECTED]" > _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
