--- system-image-sh4/dev-environment.sh
+++ system-image-sh4.patched/dev-environment.sh
@@ -41,9 +41,9 @@
     export PATH=/sbin:/usr/sbin:$PATH
   fi
 
-  truncate -s ${HDBMEGS}m "$HDB" &&
-  mke2fs -q -b 1024 -F "$HDB" -i 4096 &&
-  tune2fs -j -c 0 -i 0 "$HDB"
+  dd if=/dev/zero of="$HDB" bs=1 count=0 seek=${HDBMEGS}M &&
+  mke2fs -i 4096 -q -b 1024 -F "$HDB" &&
+  tune2fs -c 0 -i 0 "$HDB"
 
   [ $? -ne 0 ] && exit 1
 }