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SubjectRe: Linux-2.6.8 Hates DOS partitions
Date
msdos==vfat?
lilo installed in MBR (Unsafe in some situations!!)?
toggle bootability flag with fdisk (under linux ofcourse)?



On Wednesday 13 October 2004 19:31, Richard B. Johnson wrote:
> Hello DOS haters!
>
> I used to boot my system as:
>
> aic7xxx [SCSI 0]
> /dev/sda LILO boot record
> /dev/sda1 DOS drive C:
> /dev/sda5 DOS drive D:
> [SCSI 1]
> /dev/sdb1 ext2 root "/"
> /dev/sdb2 swap-file
> [SCSI 2]
> /dev/sdc1 ext3 fs
> /dev/sdc2 swap-file
> /dev/sdc3 ext3 fs
>
>
> /dev/sdb1 / ext2 rw,noatime 0 1
> /dev/sdc1 /alt ext2 rw,noatime 0 2
> /dev/sdb2 none swap defaults 0 2
> /dev/sdc2 none swap defaults 0 2
> /dev/sdc3 /home/users ext2 rw,noatime 0 2
> none /proc proc defaults 0 2
> /dev/sda1 /dos/drive_C msdos defaults 0 2
> /dev/sda5 /dos/drive_D msdos defaults 0 2
>
>
> Then I added a completely different hard-disk to
> boot the following:
>
> LABEL=/ (/dev/hda2) / ext3 defaults 1 1
> none /dev/pts devpts gid=5,mode=666 0 0
> none /dev/shm tmpfs defaults 0 0
> none /proc proc defaults 0 0
> none /sys sysfs defaults 0 0
> /dev/sdb1 /home/project ext2 defaults 0 0
> /dev/sda1 /dos/drive_C msdos defaults 0 0
> /dev/sda5 /dos/drive_D msdos defaults 0 0
> /dev/hda3 swap swap defaults 0 0
> /dev/sdb2 swap swap defaults 0 0
> /dev/sdc2 swap swap defaults 0 0
>
> Only the DOS partitions and the swap are used in this new configuration.
> This is a new "Fedora Linux 2" installation on a completely
> different IDE hard disk, in which I have to enable boot disks in
> the BIOS to boot the new system.
>
> Immediately after installing the new system I reverted (in the BIOS)
> to the original to make sure that I was still able to boot the old
> system and the DOS partition. Everything was fine.
>
> Then I installed linux-2.6.8 after building a new kernel with
> the old ".config" file used as `make oldconfig`. Everything was
> fine after that, also.
>
> I have now run for about a week and I can't boot the DOS partition
> anymore! I can boot from a DOS diskette and DOS sees 'C:', but
> not 'D:'. DOS 'thinks' that C: is bootable but I get "Missing
> operating system" when it attempts to boot. I have executed
> `fdisk /mbr`, and `sys C:`, as well as Norton's `ndd`. Everything
> seems to 'think' that the system should boot. However, it
> doesn't.
>
> I can boot Linux from an emergency floppy and re-run LILO to
> make my first SCSI bootable. It will boot Linux, but not
> DOS. I can also boot DOS from a floppy and access the
> "C:" partition, but not the "D:" one.
>
> It looks like the new operating system, linux-2.6.8, has
> done something bad when it used my SCSI disks for swap.
>
> I can copy everything from C: and D: from within Linux
> and then re-do the DOS partitions, BUT.... bad stuff
> will happen again unless the cause is found. I never
> had any such problem with linux-2.4.26 and below. I
> could even execute dosemu and run DOS compilers, editors,
> and assemblers. Not anymore. DOSEMU-1.3.1 won't even
> compile with the new 'C' compiler, but that's another
> problem.
>
>
> Cheers,
> Dick Johnson
> Penguin : Linux version 2.6.8 on an i686 machine (5537.79 BogoMips).
> Note 96.31% of all statistics are fiction.
>
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