diff --git a/src/utility/bitmap.rs b/src/utility/bitmap.rs
index 4af76a1..0892b31 100644
--- a/src/utility/bitmap.rs
+++ b/src/utility/bitmap.rs
@@ -4,6 +4,8 @@ pub const BITS_IN_WORD: usize = 32;
 use std::fs::File;
 use std::io::{Cursor, Write, Read};
 
+use crate::drivers::drv_disk::{self, DrvDisk};
+use crate::filesys::openfile::OpenFile;
 use crate::simulator::disk::SECTOR_SIZE;
 
 pub struct BitMap {
@@ -21,11 +23,10 @@ impl BitMap {
     ///	- **nitems** is the number of bits in the bitmap.
     ///----------------------------------------------------------------------
     pub fn init_bitmap(n_items: usize) -> BitMap {
-        let mut tmp: Vec<u32>;
         BitMap{
             num_bits: n_items,
             num_words: (n_items + SECTOR_SIZE as usize -1) / SECTOR_SIZE as usize,
-            map: tmp,
+            map: vec![0,n_items as u32],
         }
     }
 
@@ -100,13 +101,11 @@ impl BitMap {
     ///
     /// ### Parameters
     ///	- **file** is the place to read the bitmap from
-    pub fn fetch_from(&mut self, file_path: &str) -> std::io::Result<&Vec<u32>> {
-        // Ouvre le fichier en mode lecture seule
-        let mut file = File::open(file_path)?;
+    pub fn fetch_from(&mut self, file: &mut OpenFile, drv_disk: &mut DrvDisk) -> std::io::Result<&Vec<u32>> {
+        let mut num_bytes = self.num_words * std::mem::size_of::<u32>();
 
-        // Lit les octets du fichier dans un buffer
         let mut buffer = vec![0; self.num_words * std::mem::size_of::<u32>()];
-        file.read_exact(&mut buffer)?;
+        OpenFile::read(drv_disk, file, &mut buffer, num_bytes as i32);
 
         // Convertit les octets en vecteur de u32
         self.map = vec![0; self.num_words];
@@ -125,19 +124,17 @@ impl BitMap {
     ///
     /// ### Paramenters
     /// - **file** is the place to write the bitmap to
-    pub fn write_back(&mut self, file_path: &str) -> std::io::Result<()> {
+    pub fn write_back(&mut self, file: &mut OpenFile, drv_disk: &mut DrvDisk) -> std::io::Result<()> {
+        let mut num_bytes = self.num_words * std::mem::size_of::<u32>();
+
         // Encapsule le vecteur dans un std::io::Cursor pour l'utiliser comme un std::io::Write
         let mut cursor = Cursor::new(Vec::<u8>::new());
         for u32_val in self.map.as_mut_slice() {
             cursor.write_all(&u32_val.to_le_bytes())?;
         }
 
-        // Ouvre le fichier en mode écriture
-        let mut file = File::create(file_path)?;
-
+        OpenFile::read_at(drv_disk, file, &mut cursor.into_inner(), num_bytes as i32, 0);
         // Écrit les données dans le fichier
-        file.write_all(&cursor.into_inner())?;
-
         Ok(())
     }
 }
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