docs(dedibox-hardware): update smartctl troubleshooting ext-fix-dedibox-defective-disk-position

pages/dedibox-hardware/troubleshooting/diagnose-defective-disk.mdx

@@ -187,6 +187,20 @@ ATA Standard is: ATA-8-ACS revision 3b
 Local Time is: Fri Oct 29 11:20:27 2010 CEST
 ```
 
+## Retrieve disk position
+
+The most important step when you create a support ticket to replace a defective disk is to also provide the **physical location** of the all disks.
+
+Here is a command you can run to retrieve the position of the all disks and send it the result in your ticket :
+
+<Message type="important">
+  This command works **only for software RAID** setups.
+</Message>
+
+```
+lsblk --paths --sort HCTL --output hctl,name,size,model,rev,serial,tran,phy-sec --bytes | grep -v loop0
+```
+
 <Message type="tip">
   For more information on Smartmontools, refer to the [official documentation](https://www.smartmontools.org/wiki/TocDoc).
 </Message>