Posted: Fri Aug 28, 2009 16:49 Post subject: 30/30/30 Reset
Can anyone tell me the importance of 30/30/30 reset BEFORE updating the router to the newest version of dd-wrt? Do I really need to do that? I could not find any answers here.
Failing to do a hard reset and failing to wait after flashing are the two most common NOOB errors that lead them to a world of unnecessary dd-wrt pain! This is not a minor optional step. The firmware writes information to the Nvram. This step clears that information. If you don't clear it properly, parts of the old information be present with the new firmware, which can make it not operate properly. Don't cut corners. Doing it before you upgrade can be very important; a hard reset is not just for after upgrades.
Joined: 04 Jan 2007 Posts: 11564 Location: Wherever the wind blows- North America
Posted: Tue Sep 01, 2009 23:32 Post subject:
Doing a 30/30/30 before the firmware update clears the nvram section BEFORE the firmware configures itself. If it is cleared before hand, then no nvram variables can "interfere" with the firmware configuring itself.
Once the firmware configures itself, it creates NEW nvram variables...some of which are only used for firmware configuration purposes, so a 30/30/30 after the load is also recommended as not to interfere with router configuration.
Once the firmware has finished configuring itself, it then reboots without any nvram variables to mess up your router configuration when you run through all the tabs.
So...there are actually 2 configurations taking place during a firmware upgrade...one is the Firmware configuration for your routers hardware....the second configuration is your router configuration that you set for your desired network setup.
redhawk _________________ The only stupid question....is the unasked one.
Thanks redhawk, but wouldn't 30/30/30 AFTER clear it all??
Thanks again!
redhawk0 wrote:
Doing a 30/30/30 before the firmware update clears the nvram section BEFORE the firmware configures itself. If it is cleared before hand, then no nvram variables can "interfere" with the firmware configuring itself.
Once the firmware configures itself, it creates NEW nvram variables...some of which are only used for firmware configuration purposes, so a 30/30/30 after the load is also recommended as not to interfere with router configuration.
Once the firmware has finished configuring itself, it then reboots without any nvram variables to mess up your router configuration when you run through all the tabs.
So...there are actually 2 configurations taking place during a firmware upgrade...one is the Firmware configuration for your routers hardware....the second configuration is your router configuration that you set for your desired network setup.
redhawk
_________________ My DD-WRT Routers:
Netgear WNDR3300, Linksys WRT54G2, Asus WL-520GU, Dell TrueMobile 2300, Belkin F5D7230-4 v1444
Joined: 04 Jan 2007 Posts: 11564 Location: Wherever the wind blows- North America
Posted: Wed Sep 02, 2009 14:00 Post subject:
idmitriy wrote:
Thanks redhawk, but wouldn't 30/30/30 AFTER clear it all??
Thanks again!
redhawk0 wrote:
Doing a 30/30/30 before the firmware update clears the nvram section BEFORE the firmware configures itself. If it is cleared before hand, then no nvram variables can "interfere" with the firmware configuring itself.
Once the firmware configures itself, it creates NEW nvram variables...some of which are only used for firmware configuration purposes, so a 30/30/30 after the load is also recommended as not to interfere with router configuration.
Once the firmware has finished configuring itself, it then reboots without any nvram variables to mess up your router configuration when you run through all the tabs.
So...there are actually 2 configurations taking place during a firmware upgrade...one is the Firmware configuration for your routers hardware....the second configuration is your router configuration that you set for your desired network setup.
redhawk
Yes...but how will you know for sure that the firmware configuration isn't corrupt due to a variable that wasn't cleared before the firmware was loaded.
redhawk _________________ The only stupid question....is the unasked one.
Well the firmware configuration has it's own default settings. Even if I hard reset it will retain that configuration on it's own. Am I right? Then what's good will it do if we do 30/30/30 BEFORE?
redhawk
Quote:
Yes...but how will you know for sure that the firmware configuration isn't corrupt due to a variable that wasn't cleared before the firmware was loaded.
redhawk
_________________ My DD-WRT Routers:
Netgear WNDR3300, Linksys WRT54G2, Asus WL-520GU, Dell TrueMobile 2300, Belkin F5D7230-4 v1444
Joined: 26 Jan 2008 Posts: 13049 Location: Behind The Reset Button
Posted: Wed Sep 02, 2009 18:12 Post subject:
old nvram
offset
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
p a r a m a = a b c d e f g h i j k l
new nvram
offset
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
p a r a m a = a b c d e f g h i j
new nvram without erasing nvram before flash
offset
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
p a r a m a = a b c d e f g h i j k l <= this is NFG...
without erasing nvram 1st, parama will have two incorrect bytes at the end which can and will screw things up. It could also make the router not boot at all depending on what and where. _________________ [Moderator Deleted]
Last edited by barryware on Wed Sep 02, 2009 18:13; edited 1 time in total
Joined: 04 Jan 2007 Posts: 11564 Location: Wherever the wind blows- North America
Posted: Wed Sep 02, 2009 18:13 Post subject:
The firmware has to configure itself for your hardware...its a generic firmware...capable of running on many, many, many different makes/models/versions all rolled into one Firmware package.
To ensure you get the correct configurations for YOUR hardware it is advised to clear the nvram section BEFORE loading the firmware so it is starting fresh and no "old" extraneous variables cause any problems with that configuration.
I don't know what more to tell you...the recommendation is BEFORE and AFTER...clear nvram partition is important to ensure a clean configuration and smooth router operation.
redhawk _________________ The only stupid question....is the unasked one.
You do a 30/30/30 reset AFTER and "k l" is gone!
That's why we do 30/30/30 AFTER! Right?
barryware wrote:
old nvram
offset
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
p a r a m a = a b c d e f g h i j k l
new nvram
offset
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
p a r a m a = a b c d e f g h i j
new nvram without erasing nvram before flash
offset
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
p a r a m a = a b c d e f g h i j k l <= this is NFG...
without erasing nvram 1st, parama will have two incorrect bytes at the end which can and will screw things up. It could also make the router not boot at all depending on what and where.
_________________ My DD-WRT Routers:
Netgear WNDR3300, Linksys WRT54G2, Asus WL-520GU, Dell TrueMobile 2300, Belkin F5D7230-4 v1444
Joined: 26 Jan 2008 Posts: 13049 Location: Behind The Reset Button
Posted: Wed Sep 02, 2009 18:27 Post subject:
idmitriy wrote:
You do a 30/30/30 reset AFTER and "k l" is gone!
That's why we do 30/30/30 AFTER?
barryware wrote:
old nvram
offset
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
p a r a m a = a b c d e f g h i j k l
new nvram
offset
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
p a r a m a = a b c d e f g h i j
new nvram without erasing nvram before flash
offset
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
p a r a m a = a b c d e f g h i j k l <= this is NFG...
without erasing nvram 1st, parama will have two incorrect bytes at the end which can and will screw things up. It could also make the router not boot at all depending on what and where.
Providing the router boots at all with the wrong parama..
The reason why I ask this. I have not noticed the difference on all of my routers (5) so far...
But thanks for your responds! I appreciated it! _________________ My DD-WRT Routers:
Netgear WNDR3300, Linksys WRT54G2, Asus WL-520GU, Dell TrueMobile 2300, Belkin F5D7230-4 v1444
