Default prepare_vg uses 512K - so update test accordingly
check lv_field $vg/$lv1 lv_modules "error"
check lv_field $vg/$lv1 segtype "error"
check lv_field $vg/$lv1 seg_count "1"
-check lv_field $vg/$lv1 seg_size_pe "8" # 8 * 256
+check lv_field $vg/$lv1 seg_size_pe "4" # 4 * 512 => 2M
# FIXME should we print info we are ignoring stripping?
lvextend -L+1 -I64 -i2 $vg/$lv1
check lv_field $vg/$lv1 lv_modules "zero"
check lv_field $vg/$lv1 segtype "zero"
check lv_field $vg/$lv1 seg_count "1"
-check lv_field $vg/$lv1 seg_size_pe "8" # 8 * 256
+check lv_field $vg/$lv1 seg_size_pe "4" # 4 * 512
vgremove -ff $vg