diff --git a/src/disk.sh b/src/disk.sh
index ab4eebf..9ff3f4f 100644
--- a/src/disk.sh
+++ b/src/disk.sh
@@ -135,10 +135,12 @@ createDisk() {
       else
 
         # Create an empty file
-        if ! fallocate -l "$DATA_SIZE" "$DISK_FILE"; then
-          if ! truncate -s "$DATA_SIZE" "$DISK_FILE"; then
-            rm -f "$DISK_FILE"
-            error "$FAIL" && exit 77
+        if ! fallocate -l "$DATA_SIZE" "$DISK_FILE" &>/dev/null; then
+          if ! fallocate -l -x "$DATA_SIZE" "$DISK_FILE"; then
+            if ! truncate -s "$DATA_SIZE" "$DISK_FILE"; then
+              rm -f "$DISK_FILE"
+              error "$FAIL" && exit 77
+            fi
           fi
         fi
 
@@ -213,9 +215,11 @@ resizeDisk() {
       else
 
         # Resize file by allocating more space
-        if ! fallocate -l "$DATA_SIZE" "$DISK_FILE"; then
-          if ! truncate -s "$DATA_SIZE" "$DISK_FILE"; then
-            error "$FAIL" && exit 75
+        if ! fallocate -l "$DATA_SIZE" "$DISK_FILE" &>/dev/null; then
+          if ! fallocate -l -x "$DATA_SIZE" "$DISK_FILE"; then
+            if ! truncate -s "$DATA_SIZE" "$DISK_FILE"; then
+              error "$FAIL" && exit 75
+            fi
           fi
         fi
 
@@ -290,8 +294,10 @@ convertDisk() {
     if [[ "$ALLOCATE" != [Nn]* ]]; then
       # Work around qemu-img bug
       CUR_SIZE=$(stat -c%s "$TMP_FILE")
-      if ! fallocate -l "$CUR_SIZE" "$TMP_FILE"; then
+      if ! fallocate -l "$CUR_SIZE" "$TMP_FILE" &>/dev/null; then
+        if ! fallocate -l -x "$CUR_SIZE" "$TMP_FILE"; then
           error "Failed to allocate $CUR_SIZE bytes for $DISK_DESC image $TMP_FILE"
+        fi
       fi
     fi
   fi
diff --git a/src/install.sh b/src/install.sh
index ee6a69b..23959d5 100644
--- a/src/install.sh
+++ b/src/install.sh
@@ -58,7 +58,7 @@ downloadFile() {
   local url="$1"
   local base="$2"
   local name="$3"
-  local msg rc total total_mb progress name
+  local msg rc total size progress
 
   local dest="$STORAGE/$base.tmp"
   rm -f "$dest"
@@ -88,9 +88,9 @@ downloadFile() {
 
   if (( rc == 0 )) && [ -f "$dest" ]; then
     total=$(stat -c%s "$dest")
-    total_gb=$(formatBytes "$total")
+    size=$(formatBytes "$total")
     if [ "$total" -lt 100000 ]; then
-      error "Invalid image file: is only $total_gb ?" && return 1
+      error "Invalid image file: is only $size ?" && return 1
     fi
     html "Download finished successfully..."
     mv -f "$dest" "$STORAGE/$base"
@@ -173,8 +173,10 @@ convertImage() {
       # Work around qemu-img bug
       cur_size=$(stat -c%s "$tmp_file")
       cur_gb=$(formatBytes "$cur_size")
-      if ! fallocate -l "$cur_size" "$tmp_file"; then
-        error "Failed to allocate $cur_gb for image!"
+      if ! fallocate -l "$cur_size" "$tmp_file" &>/dev/null; then
+        if ! fallocate -l -x "$cur_size" "$tmp_file"; then
+          error "Failed to allocate $cur_gb for image!"
+        fi
       fi
     fi
   fi