boot not found

If your system displays this message when you turn on the power to your computer, the /boot file is missing:

   boot not found
   Cannot open
   Stage 1 boot failure: error loading hd(40)/boot

If /boot is missing, use this procedure to boot the system from the emergency boot floppy disk set so that you can then restore the file:

1. Insert the boot floppy disk in the drive and reboot the machine. This executes the initial boot from the boot floppy disk.

2. At the Boot: prompt, enter:
   
   fd(60)unix.Z root=hd(42)

   This command boots the system from the floppy disk, loads the
   
   the kernel from the floppy disk, and mounts the root filesystem.

3. Bring up the system in single-user mode by entering the root password at the prompt.
   

4. 
   Unmount the /stand filesystem (where boot and the kernel are located):
   
   umount /stand

   The reason for this is that /stand is normally mounted read-only and you must unmount it and mount it again before you can replace boot.

5. Re-mount /stand:
   
   mount /stand

6. 
   Now mount the boot floppy disk:
   
   mount -r /dev/fd0 /mnt

7. While the floppy disk is in the drive, restore the /boot file by entering this command at the system prompt:
   
   cp /mnt/boot /stand

   This places a new copy of the /boot file on the hard disk.

8. Before you remove the floppy disk from the drive, unmount the boot floppy disk (/dev/fd0) by entering:
   
   umount /mnt

   
   

9. Remove the floppy disk from the drive and bring down the system using haltsys(ADM).

10. Reboot the system from the hard disk by pressing <Enter> at the Boot: prompt.