Index: linux-2.6.18-128.1.6/fs/ext4/super.c
===================================================================
--- linux-2.6.18-128.1.6.orig/fs/ext4/super.c
+++ linux-2.6.18-128.1.6/fs/ext4/super.c
@@ -47,6 +47,8 @@
 #include "namei.h"
 #include "group.h"
 
+static int force_over_8tb;
+
 static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
 			     unsigned long journal_devnum);
 static int ext4_create_journal(struct super_block *, struct ext4_super_block *,
@@ -1227,6 +1229,7 @@ enum {
 	Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version,
 	Opt_mballoc, Opt_nomballoc, Opt_stripe,
 	Opt_iopen, Opt_noiopen, Opt_iopen_nopriv, Opt_bigendian_extents,
+	Opt_force_over_8tb,
 };
 
 static match_table_t tokens = {
@@ -1289,6 +1292,7 @@ static match_table_t tokens = {
 	{Opt_stripe, "stripe=%u"},
 	{Opt_resize, "resize"},
 	{Opt_bigendian_extents, "bigendian_extents"},
+	{Opt_force_over_8tb, "force_over_8tb"},
 	{Opt_err, NULL},
 };
 
@@ -1690,6 +1694,9 @@ clear_qf_name:
 		case Opt_bigendian_extents:
 			bigendian_extents = 1;
 			break;
+		case Opt_force_over_8tb:
+			force_over_8tb = 1;
+			break;
 		default:
 			printk(KERN_ERR
 			       "EXT4-fs: Unrecognized mount option \"%s\" "
@@ -2534,6 +2541,17 @@ static int ext4_fill_super(struct super_
 		goto failed_mount;
 	}
 
+	if (ext4_blocks_count(es) >
+	    ((0x80000000000ULL >> sb->s_blocksize_bits) - 1)) {
+		if (force_over_8tb == 0) {
+			printk(KERN_ERR "EXT4-fs does not support filesystems "
+			       "greater than 8TB and can cause data corruption."
+			       "Use \"force_over_8tb\" mount option to override."
+			       "\n");
+			goto failed_mount;
+		}
+	}
+
 	if (EXT4_BLOCKS_PER_GROUP(sb) == 0)
 		goto cantfind_ext4;