Dell PowerEdge M600 - Manual (Page 205)

System Board Information
205
Table 7-3. PowerEdge M600 Jumper Settings
PWRD_EN (default) The password feature is enabled.
The password feature is disabled.
NVRAM_CLR (default) The configuration settings are retained at
system boot.
The configuration settings are cleared at the
next system boot. (If the configuration settings
become corrupted to the point where the
system will not boot, install the jumper and
boot the system. Remove the jumper before
restoring the configuration information.)