installboot command failed

[Marco Beishuizen <mbeis%xs4all.nl@localhost>]

Hi,

I'm trying to install NetBSD/i386 on an old laptop (entire disk for 
NetBSD). After partitioning the installboot command fails with:

installboot: Old BPB too big, use -f (may invalidate filesystem)
installboot: Set bootstrap operation failed

How to go from here? Installation is possible but after that the disk 
doesn't boot. I tried fdisk -i and fdisk -B, but without any effect.

Regards,
Marco

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