our (@disks);
die "$disks[0]: can't find OS disk\n" if ! -e $disks[0];
+ die "$disks[0]: OS disk cannot have zero size\n" if ! -s $disks[0];
for my $i (1...3) {
- undef $disks[$i] if ! -e $disks[$i];
+ undef $disks[$i] if ! -s $disks[$i];
}
if (my ($project) = `pwd` =~ /\b(threads|userprog|vm|filesys)\b/) {