26.11.2014 21:59, pe...@easthope.ca wrote: > Here there are three diskettes which at least two machines > cold boot from. Also the qemu virtual machine boots from > the diskette image file. In fact that has allowed installation ...
Instead of trying random things or diskettes, you can be quite a bit more productive and actually take the steps I suggested, whcih are trying qemu-2.1 series from backports, and comparing strace of working and non-working run (image file and /dev/fd0). > of an OS by this procedure. > http://www.ocp.inf.ethz.ch/wiki/Documentation/Installation#toc23 > > These are the results when attempting to boot the qemu virtual > machine from the diskettes. > > root@dalton:/home/peter# qemu-system-i386 -fda /dev/fd0 -vga std -boot a > qemu-system-i386: -fda /dev/fd0: could not open disk image /dev/fd0: Could > not refresh total sector count: Input/output error > > root@dalton:/home/peter# qemu-system-i386 -fda /dev/fd0 -vga std -boot a > qemu-system-i386: -fda /dev/fd0: could not open disk image /dev/fd0: Could > not open '/dev/fd0': Permission denied There's somethig fishy going on here. The first time qemu is able to open /dev/fd0, but the next time it fails with `permission denied' error, for root user. This is a /dev/fd0 device malfunctioning, most likely a floppy driver error. Which I already suggested to be the case before. > > root@dalton:/home/peter# qemu-system-i386 -fda /dev/fd0 -vga std -boot a > qemu-system-i386: -fda /dev/fd0: could not open disk image /dev/fd0: Could > not open '/dev/fd0': Permission denied > > "Could not refresh total sector count" might be significant. I don't know. Yes, it is yet another indicator of your /dev/fd0 malfunctioning. Refreshing total sector count does this (block/raw_posix.c): static int64_t raw_getlength(BlockDriverState *bs) { BDRVRawState *s = bs->opaque; int ret; int64_t size; ret = fd_open(bs); if (ret < 0) { return ret; } size = lseek(s->fd, 0, SEEK_END); if (size < 0) { return -errno; } return size; } so it merely opens the device file and seeks at the end of it. This return EIO (input/output error), it should not. This is how size of all other devices is detected. /mjt -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
