hello ,
  
    my 
7513 lost configuration , i don't know why ?
    i have 
something like :
    
Rbackbone#wr
    startup-config file open failed (Device 
or resource busy)
 
    Rbackbone#sh startup-config 
    Using 35806 out of 126968 bytes
    
%Error opening nvram:/startup-config (Device or resource busy)
 
    Best regards 
 .