diff --git a/Cargo.lock b/Cargo.lock
index 9b13c4c..af2c2a2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5,6 +5,16 @@ dependencies = [
  "bitflags 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "env_logger 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "aho-corasick"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -26,6 +36,15 @@ dependencies = [
  "time 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "env_logger"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "kernel32-sys"
 version = "0.2.2"
@@ -35,11 +54,29 @@ dependencies = [
  "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "lazy_static"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "libc"
 version = "0.2.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "log"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "memchr"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.32 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "num"
 version = "0.1.40"
@@ -77,6 +114,32 @@ name = "redox_syscall"
 version = "0.1.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "regex"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aho-corasick 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "utf8-ranges 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "thread_local"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unreachable 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "time"
 version = "0.1.38"
@@ -88,6 +151,24 @@ dependencies = [
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "unreachable"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "utf8-ranges"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "winapi"
 version = "0.2.8"
@@ -99,16 +180,27 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [metadata]
+"checksum aho-corasick 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)" = "500909c4f87a9e52355b26626d890833e9e1d53ac566db76c36faa984b889699"
 "checksum bitflags 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f5cde24d1b2e2216a726368b2363a273739c91f4e3eb4e0dd12d672d396ad989"
 "checksum byteorder 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ff81738b726f5d099632ceaffe7fb65b90212e8dce59d518729e7e8634032d3d"
 "checksum chrono 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7c20ebe0b2b08b0aeddba49c609fe7957ba2e33449882cb186a180bc60682fa9"
+"checksum env_logger 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3ddf21e73e016298f5cb37d6ef8e8da8e39f91f9ec8b0df44b7deb16a9f8cd5b"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
+"checksum lazy_static 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "c9e5e58fa1a4c3b915a561a78a22ee0cac6ab97dca2504428bc1cb074375f8d5"
 "checksum libc 0.2.32 (registry+https://github.com/rust-lang/crates.io-index)" = "56cce3130fd040c28df6f495c8492e5ec5808fb4c9093c310df02b0c8f030148"
+"checksum log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "880f77541efa6e5cc74e76910c9884d9859683118839d6a1dc3b11e63512565b"
+"checksum memchr 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1dbccc0e46f1ea47b9f17e6d67c5a96bd27030519c519c9c91327e31275a47b4"
 "checksum num 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)" = "a311b77ebdc5dd4cf6449d81e4135d9f0e3b153839ac90e648a8ef538f923525"
 "checksum num-integer 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)" = "d1452e8b06e448a07f0e6ebb0bb1d92b8890eea63288c0b627331d53514d0fba"
 "checksum num-iter 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)" = "7485fcc84f85b4ecd0ea527b14189281cf27d60e583ae65ebc9c088b13dffe01"
 "checksum num-traits 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)" = "99843c856d68d8b4313b03a17e33c4bb42ae8f6610ea81b28abe076ac721b9b0"
 "checksum redox_syscall 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)" = "8dde11f18c108289bef24469638a04dce49da56084f2d50618b226e47eb04509"
+"checksum regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1731164734096285ec2a5ec7fea5248ae2f5485b3feeb0115af4fda2183b2d1b"
+"checksum regex-syntax 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ad890a5eef7953f55427c50575c680c42841653abd2b028b68cd223d157f62db"
+"checksum thread_local 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "1697c4b57aeeb7a536b647165a2825faddffb1d3bad386d507709bd51a90bb14"
 "checksum time 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)" = "d5d788d3aa77bc0ef3e9621256885555368b47bd495c13dd2e7413c89f845520"
+"checksum unreachable 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "382810877fe448991dfc7f0dd6e3ae5d58088fd0ea5e35189655f84e6814fa56"
+"checksum utf8-ranges 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "662fab6525a98beff2921d7f61a39e7d59e0b425ebc7d0d9e66d316e55124122"
+"checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
diff --git a/Cargo.toml b/Cargo.toml
index 6a75a1d..f35fa54 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,4 +23,8 @@ default = ["chrono"]
 [dependencies]
 byteorder = "1"
 bitflags = "1.0"
+log = "0.3.8"
 chrono = { version = "0.4", optional = true }
+
+[dev-dependencies]
+env_logger = "0.4.3"
diff --git a/src/dir.rs b/src/dir.rs
index c3bfa63..f9e106d 100644
--- a/src/dir.rs
+++ b/src/dir.rs
@@ -453,7 +453,7 @@ impl LongNameBuilder {
             self.truncate();
             self.buf
         } else {
-            //println!("unfinished LFN sequence {}", self.index);
+            warn!("unfinished LFN sequence {}", self.index);
             Vec::<u16>::new()
         }
     }
@@ -478,7 +478,7 @@ impl LongNameBuilder {
         let index = data.order & 0x1F;
         if index == 0 {
             // Corrupted entry
-            //println!("currupted lfn entry! {:x}", data.order);
+            warn!("currupted lfn entry! {:x}", data.order);
             self.clear();
             return;
         }
@@ -489,7 +489,7 @@ impl LongNameBuilder {
             self.buf.resize(index as usize * LFN_PART_LEN, 0);
         } else if self.index == 0 || index != self.index - 1 || data.checksum != self.chksum {
             // Corrupted entry
-            //println!("currupted lfn entry! {:x} {:x} {:x} {:x}", data.order, self.index, data.checksum, self.chksum);
+            warn!("currupted lfn entry! {:x} {:x} {:x} {:x}", data.order, self.index, data.checksum, self.chksum);
             self.clear();
             return;
         } else {
@@ -506,7 +506,7 @@ impl LongNameBuilder {
     fn validate_chksum(&mut self, short_name: &[u8]) {
         let chksum = lfn_checksum(short_name);
         if chksum != self.chksum {
-            //println!("checksum mismatch {:x} {:x} {:?}", chksum, self.chksum, short_name);
+            warn!("checksum mismatch {:x} {:x} {:?}", chksum, self.chksum, short_name);
             self.clear();
         }
     }
diff --git a/src/file.rs b/src/file.rs
index c5c3dd0..a757b47 100644
--- a/src/file.rs
+++ b/src/file.rs
@@ -167,7 +167,7 @@ impl<'a, 'b> Read for File<'a, 'b> {
         if read_size == 0 {
             return Ok(0);
         }
-        //println!("read c {} n {}", current_cluster, read_size);
+        trace!("read {} bytes in cluster {}", read_size, current_cluster);
         let offset_in_fs = self.fs.offset_from_cluster(current_cluster) + (offset_in_cluster as u64);
         let read_bytes = {
             let mut disk = self.fs.disk.borrow_mut();
@@ -189,7 +189,6 @@ impl<'a, 'b> Write for File<'a, 'b> {
         let offset_in_cluster = self.offset % cluster_size;
         let bytes_left_in_cluster = (cluster_size - offset_in_cluster) as usize;
         let write_size = cmp::min(buf.len(), bytes_left_in_cluster);
-        //println!("write {:?}", write_size);
         // Exit early if we are going to write no data
         if write_size == 0 {
             return Ok(0);
@@ -226,6 +225,7 @@ impl<'a, 'b> Write for File<'a, 'b> {
                 None => panic!("Offset inside cluster but no cluster allocated"),
             }
         };
+        trace!("write {} bytes in cluster {}", write_size, current_cluster);
         let offset_in_fs = self.fs.offset_from_cluster(current_cluster) + (offset_in_cluster as u64);
         let written_bytes = {
             let mut disk = self.fs.disk.borrow_mut();
diff --git a/src/lib.rs b/src/lib.rs
index 4684081..43bb0cd 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,6 +7,9 @@ extern crate core;
 #[macro_use]
 extern crate bitflags;
 
+#[macro_use]
+extern crate log;
+
 #[cfg(feature = "chrono")]
 extern crate chrono;
 
diff --git a/src/table.rs b/src/table.rs
index 7ac2285..7c7d03f 100644
--- a/src/table.rs
+++ b/src/table.rs
@@ -35,7 +35,7 @@ fn read_fat(fat: &mut ReadSeek, fat_type: FatType, cluster: u32) -> io::Result<F
 }
 
 fn write_fat(fat: &mut DiskSlice, fat_type: FatType, cluster: u32, value: FatValue) -> io::Result<()> {
-    //println!("write_fat {} {:?}", cluster, value);
+    trace!("write FAT - cluster {} value {:?}", cluster, value);
     match fat_type {
         FatType::Fat12 => Fat12::set(fat, cluster, value),
         FatType::Fat16 => Fat16::set(fat, cluster, value),
@@ -65,7 +65,7 @@ pub(crate) fn alloc_cluster(fat: &mut DiskSlice, fat_type: FatType, prev_cluster
     if prev_cluster.is_some() {
         write_fat(fat, fat_type, prev_cluster.unwrap(), FatValue::Data(new_cluster))?; // safe
     }
-    //println!("alloc_cluster {}", new_cluster);
+    trace!("allocated cluster {}", new_cluster);
     Ok(new_cluster)
 }
 
diff --git a/tests/read.rs b/tests/read.rs
index 239aba8..622918f 100644
--- a/tests/read.rs
+++ b/tests/read.rs
@@ -1,4 +1,5 @@
 extern crate fatfs;
+extern crate env_logger;
 
 use std::fs;
 use std::io::SeekFrom;
@@ -13,6 +14,7 @@ const FAT16_IMG: &str = "resources/fat16.img";
 const FAT32_IMG: &str = "resources/fat32.img";
 
 fn call_with_fs(f: &Fn(FileSystem) -> (), filename: &str) {
+    let _ = env_logger::init();
     let file = fs::File::open(filename).unwrap();
     let mut buf_file = BufStream::new(file);
     let fs = FileSystem::new(&mut buf_file).unwrap();
diff --git a/tests/write.rs b/tests/write.rs
index 92a1303..1eb7245 100644
--- a/tests/write.rs
+++ b/tests/write.rs
@@ -1,4 +1,5 @@
 extern crate fatfs;
+extern crate env_logger;
 
 use std::fs;
 use std::io::prelude::*;
@@ -16,6 +17,7 @@ const TMP_DIR: &str = "tmp";
 const TEST_STR: &str = "Hi there Rust programmer!\n";
 
 fn call_with_fs(f: &Fn(FileSystem) -> (), filename: &str, test_seq: u32) {
+    let _ = env_logger::init();
     let img_path = format!("{}/{}", IMG_DIR, filename);
     let tmp_path = format!("{}/{}-{}", TMP_DIR, test_seq, filename);
     fs::create_dir(TMP_DIR).ok();