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on my router i upgraded the firmware to dd wrt now i hit the factor reset button and expected it to go back to the 'factory ui' etc but i still see dd wrt there

on electronic devices like routers, are there 2 memories for firmware? 1 for the original factory FW
2. for the current working FW

If there is only one location to store firmware, is why devices can be 'bricked'?

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  • My observation is that more and more manufacturers are building both Computers and Routers with firmware to recover from issues however caused. I have had my X1 latop recover from a failed BIOS (UEFI) update and my Cisco RV345 router recover from a failed firmware. Both devices carried on after recovery. You need to check the manual for your device.
    – John
    Jan 30, 2023 at 0:06
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    You should assume that a "Factory Reset" refers primarily to the configuration settings, rather than any firmware version.
    – sawdust
    Jan 30, 2023 at 3:50
  • @sawdust . what do you mean by that. if i install ddwrt over my routers factory console UI.. doesnt that mean i updated the firmware. now if i hit factory reset button what configuation settings are you referring to ? thanks Jan 30, 2023 at 6:31
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    Configuration data would include the login username & password, and all the other device settings for WAN, LAN, and WLAN. IOW the data that can be modified using the web interface.
    – sawdust
    Jan 30, 2023 at 6:40

1 Answer 1

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Many devices can hold two firmwares but they are the current and previous versions to allow a failed upgrade to recover to the previous working one.

Many other devices hold only one copy and a power fail at the wrong time will brick the device.

There may be some that also hold the original factory version but I don’t know if any.

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    Even for those still relatively rare devices with backup firmware, recovering to any official firmware isn't possible after using DD-WRT or any other alternative firmware. Mar 12, 2023 at 21:21

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