diff --git a/translate_subx b/translate_subx
index 5e2db997..66df2a91 100755
--- a/translate_subx
+++ b/translate_subx
@@ -43,8 +43,8 @@ fi
 
 # Latter half of disk is for debug info.
 dd if=labels of=code.img seek=10080 conv=notrunc
-if [ `stat --printf="%s" labels` -ge 516096 ]  # 16 tracks * 63 sectors per track * 512 bytes per sector (keep this sync'd with boot.subx)
+if [ `stat --printf="%s" labels` -ge 131072 ]  # 256 sectors * 512 bytes per sector, the most an ATA drive can read in a single command
 then
-  echo "a.bin won't all be loaded on boot"
+  echo "labels won't all be loaded on abort"
   exit 1
 fi
diff --git a/translate_subx_emulated b/translate_subx_emulated
index 26dd5364..aef29801 100755
--- a/translate_subx_emulated
+++ b/translate_subx_emulated
@@ -36,7 +36,7 @@ cat a.pack        |linux/bootstrap/bootstrap linux/labels_baremetal     labels
 cat a.survey      |linux/bootstrap/bootstrap run linux/hex                            > a.bin
 
 # Create code.img containing a.bin
-dd if=/dev/zero of=code.img count=20160  # 512-byte sectors, so 10MB
+dd if=/dev/zero of=code.img count=20160  # 20*16*63 512-byte sectors = almost 10MB
 dd if=a.bin of=code.img conv=notrunc
 
 if [ `stat --printf="%s" a.bin` -ge 258048 ]  # 8 tracks * 63 sectors per track * 512 bytes per sector (keep this sync'd with boot.subx)
@@ -44,3 +44,11 @@ then
   echo "a.bin won't all be loaded on boot"
   exit 1
 fi
+
+# Latter half of disk is for debug info.
+dd if=labels of=code.img seek=10080 conv=notrunc
+if [ `stat --printf="%s" labels` -ge 131072 ]  # 256 sectors * 512 bytes per sector, the most an ATA drive can read in a single command
+then
+  echo "labels won't all be loaded on abort"
+  exit 1
+fi