diff --git a/docs/ADR/004-DNS.md b/docs/ADR/004-DNS.md
index 0a739cb..deebfb2 100644
--- a/docs/ADR/004-DNS.md
+++ b/docs/ADR/004-DNS.md
@@ -56,7 +56,7 @@ need to modify annsible system role for systemd-resolved activation and consul r
 
 ### Status
 
-Study
+done
 
 ### Context
 
@@ -80,7 +80,7 @@ DNS authority will dependant to storage (less problematic than recursor)
 
 ### Status
 
-Study
+done
 
 ### Context
 
@@ -97,4 +97,6 @@ agains:
 
 ### Decision
 
+put one recursor on cluster over authority server and keep the recursor on gerard for better recundancy
+
 ### Consequences
diff --git a/docs/ADR/005-NAS.md b/docs/ADR/005-NAS.md
new file mode 100644
index 0000000..ab9e049
--- /dev/null
+++ b/docs/ADR/005-NAS.md
@@ -0,0 +1,26 @@
+# NAS
+
+## 001 New Nas spec
+
+### Status
+
+In progress
+
+### Context
+
+Storage:
+
+- Data filesytem will be in btrfs.
+- Study if keep root filesystem in EXT4.
+- Need to use LVM over btrfs added posibility to add cache later (cache on cold data useless on beginning maybe write cache in future use).
+- hot Data (nomad, document,fresh download file,music?) on SSD cold DATA on HDD (film, serie photo)
+- at least 2 HDD and 2 SSD
+
+Hardware:
+
+- network 2.5 gpbs will be good for evolve
+- at least 4go ram
+
+Software:
+
+be able to install custom linux distrib