diff --git a/roots.c b/roots.c
index ba1786b..e28eedc 100644
--- a/roots.c
+++ b/roots.c
@@ -56,6 +56,28 @@
     return strdup(sz);
 }
 
+static int parse_options(char* options, Volume* volume) {
+    char* option;
+    while (option = strtok(options, ",")) {
+        options = NULL;
+
+        if (strncmp(option, "length=", 7) == 0) {
+            volume->length = strtoll(option+7, NULL, 10);
+        } else if (strncmp(option, "fstype2=", 8) == 0) {
+            volume->fs_type2 = volume->fs_type;
+            volume->fs_type = strdup(option);
+        } else if (strncmp(option, "fs_options=", 11) == 0) {
+            volume->fs_options = strdup(option);
+        } else if (strncmp(option, "fs_options2=", 12) == 0) {
+            volume->fs_options2 = strdup(option);
+        } else {
+            LOGE("bad option \"%s\"\n", option);
+            return -1;
+        }
+    }
+    return 0;
+}
+
 void load_volume_table() {
     int alloc = 2;
     device_volumes = malloc(alloc * sizeof(Volume));
@@ -65,8 +87,10 @@
     device_volumes[0].fs_type = "ramdisk";
     device_volumes[0].device = NULL;
     device_volumes[0].device2 = NULL;
+    device_volumes[0].fs_type2 = NULL;
     device_volumes[0].fs_options = NULL;
     device_volumes[0].fs_options2 = NULL;
+    device_volumes[0].length = 0;
     num_volumes = 1;
 
     FILE* fstab = fopen("/etc/recovery.fstab", "r");
@@ -88,10 +112,16 @@
         char* device = strtok(NULL, " \t\n");
         // lines may optionally have a second device, to use if
         // mounting the first one fails.
+        char* options = NULL;
         char* device2 = strtok(NULL, " \t\n");
-        char* fs_type2 = strtok(NULL, " \t\n");
-        char* fs_options = strtok(NULL, " \t\n");
-        char* fs_options2 = strtok(NULL, " \t\n");
+        if (device2) {
+            if (device2[0] == '/') {
+                options = strtok(NULL, " \t\n");
+            } else {
+                options = device2;
+                device2 = NULL;
+            }
+        }
 
         if (mount_point && fs_type && device) {
             while (num_volumes >= alloc) {
@@ -99,21 +129,17 @@
                 device_volumes = realloc(device_volumes, alloc*sizeof(Volume));
             }
             device_volumes[num_volumes].mount_point = strdup(mount_point);
-            device_volumes[num_volumes].fs_type = !is_null(fs_type2) ? strdup(fs_type2) : strdup(fs_type);
+            device_volumes[num_volumes].fs_type = strdup(fs_type);
             device_volumes[num_volumes].device = strdup(device);
             device_volumes[num_volumes].device2 =
-                !is_null(device2) ? strdup(device2) : NULL;
-            device_volumes[num_volumes].fs_type2 = !is_null(fs_type2) ? strdup(fs_type) : NULL;
+                device2 ? strdup(device2) : NULL;
 
-            if (!is_null(fs_type2)) {
-                device_volumes[num_volumes].fs_options2 = dupe_string(fs_options);
-                device_volumes[num_volumes].fs_options = dupe_string(fs_options2);
+            device_volumes[num_volumes].length = 0;
+            if (parse_options(options, device_volumes + num_volumes) != 0) {
+                LOGE("skipping malformed recovery.fstab line: %s\n", original);
+            } else {
+                ++num_volumes;
             }
-            else {
-                device_volumes[num_volumes].fs_options2 = NULL;
-                device_volumes[num_volumes].fs_options = dupe_string(fs_options);
-            }
-            ++num_volumes;
         } else {
             LOGE("skipping malformed recovery.fstab line: %s\n", original);
         }
@@ -126,8 +152,8 @@
     printf("=========================\n");
     for (i = 0; i < num_volumes; ++i) {
         Volume* v = &device_volumes[i];
-        printf("  %d %s %s %s %s\n", i, v->mount_point, v->fs_type,
-               v->device, v->device2);
+        printf("  %d %s %s %s %s %lld\n", i, v->mount_point, v->fs_type,
+               v->device, v->device2, v->length);
     }
     printf("\n");
 }
@@ -345,8 +371,7 @@
     }
 
     if (strcmp(v->fs_type, "ext4") == 0) {
-        reset_ext4fs_info();
-        int result = make_ext4fs(v->device, NULL, NULL, 0, 0, 0);
+        int result = make_ext4fs(v->device, v->length);
         if (result != 0) {
             LOGE("format_volume: make_extf4fs failed on %s\n", v->device);
             return -1;