openbsd-2.9/3.1 doesn't boot directly under grub-0.91

[raf]

hi,

i recently upgrade from redhat6.0 to redhat7.3 which uses grub instead
of lilo. since then i haven't been able to directly boot openbsd. when
i try, it panics and tells me that /boot is too old and i need to upgrade.
that was openbsd-2.9 so i upgraded to openbsd-3.1 and got the same error.
this happens when using grub-0.91 to directly boot openbsd using the
following commands (as instructed by the grub doco):

    title open (OpenBSD 3.1)
        root (hd1,1,a)
        kernel --type=netbsd /bsd

here's what happens:

 Boolting open (OpenBSD 3.1)
 root (hd1,1,a)
 Filesystem type is ffs, partition type 0xa6
 kernel --type=netbsd /bsd
 [NetBSD-a.out, loadaddr=0x100000, text=0x3b5000, c, data=0x52000, bss=0xc91c8,
 symtab=0x22a94, strtab=0x2b7a4, entry=0x100020]
 panic: /boot too old: upgrade!
 stopped at   0xe02e4b60:  leave
 RUN AT LEAST 'trace' AND 'ps' AND INCLUDE OUTPUT WHEN REPORTING THIS PANIC!
 DO NOT EVEN BOTHER REPORTING THIS WITHOUT INCLUDING THAT INFORMATION!
 ddb> trace
 (null)(e0621f9c,61f000,626000,8,e0621f9c,61f000,e0621fa4,e02eabfd,e02ea655,
 e05b7020,e0621fa4,e02eab65,e061f010,61f000,626000,0,0,0,0,0,0,0,0,100,
 702007ff,e05b,0,e0100335,626000,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0) at 0xe02e4b60
 (null)(e02ea655,e05b7020,e0621fa4,e02ea665,e061f010) at 0xe01c1059
 (null)(626000) at 0xe02eabfd
 ddb> ps
 PIS   PPID   PGRP    UID  S       FLAGS  WATT       COMMAND

if i boot indirectly with the following grub commands, it boots fine:

    title open (OpenBSD 3.1)
        root(hd1,1)
        chainloader +1

cheers,
raf