[comp.os.minix] MINIX.IMG booting problems on ST

jack@csmunix.larc.nasa.gov (Jack Dunn) (02/23/89)

The problem is with the format of the disk that was used to
hold the new version of MINIX. 

I went in with a sector editor and changed the GEM file
of the MINIX.IMG so that the last 16 bit word of the first
sector equaled the third from the last 16 bit word. There
were no problems.  ( The original disks I got from PH had
$01D0 for this value ).

The reason this problem comes up is that the last word
in the first sector is a GEM/TOS check sum. GEM/TOS tries
to creat a different serial number for each disk that it formats.
(random number perhaps) This cause the last word to be
different for each disk, even when an identical copy is
made by dragging the icon for one disk over the other. It
is apparent that the first sector is not copied.

Note. that this problem does not happen if the formating
program that was just relased over this net is used to
format a disk from MINIX!!!