A bit more detail here. You seem to have an old RISCOS FILECORE boot sector as you're triggering http://nxr.netbsd.org/source/xref/src/sys/arch/arm/arm/disksubr_acorn.c#366 Try writing zeros to sector 6 so the old filecore sector is ignored. http://nxr.netbsd.org/source/xref/src/sys/arch/arm/arm/dis...

We found a small bug, that is now fixed in latest NetBSD, but I think your real problem is the permissions problem. Are you superuser?

Nick

http://ftp.netbsd.org/pub/pkgsrc/packag ... .0_2012Q4/

should have what your want.

Nick