# Node-Red in a SDCard image for another PI

**URL:** <https://discourse.nodered.org/t/node-red-in-a-sdcard-image-for-another-pi/56287>\
**Category:** General\
**Created:** [8 January 2022 09:50 UTC](https://discourse.nodered.org/t/node-red-in-a-sdcard-image-for-another-pi/56287 "2022-01-08T09:50:40Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![goony](https://avatars.discourse-cdn.com/v4/letter/g/59ef9b/32.png) [@goony](https://discourse.nodered.org/u/goony)\
**Post date:** [8 January 2022 09:50 UTC](https://discourse.nodered.org/t/node-red-in-a-sdcard-image-for-another-pi/56287/1 "2022-01-08T09:50:40Z")

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Hi  
I tried to backup the whole RPi2 SDCard as an image with installed NodeRed.  
Then I made a second card and used this card in the same RPi. - no Problem  
But when I use this card in a differend RPi (same version) node-red will not start.

I think I've read about an key (cryptkey or userkey or.... I don't remember) and do not find this site anymore.

So my question.

Do I have to change some sort of key to run an already installed node-red an different hardware (same RPi version but "only" different MAC)?  
When yes, where and how?

Thank you!

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**Author:** ![jbudd](https://avatars.discourse-cdn.com/v4/letter/j/5f8ce5/32.png) [@jbudd](https://discourse.nodered.org/u/jbudd)\
**Post date:** [8 January 2022 10:07 UTC](https://discourse.nodered.org/t/node-red-in-a-sdcard-image-for-another-pi/56287/2 "2022-01-08T10:07:32Z")

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Hello @goony,

I'm pretty sure I've moved sd cards between Pies and not had a problem running Node-red.

What do you see when you try and start node-red from the command line?

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**Author:** ![goony](https://avatars.discourse-cdn.com/v4/letter/g/59ef9b/32.png) [@goony](https://discourse.nodered.org/u/goony)\
**Post date:** [8 January 2022 10:37 UTC](https://discourse.nodered.org/t/node-red-in-a-sdcard-image-for-another-pi/56287/3 "2022-01-08T10:37:09Z")

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Thank you @jbudd

I'm so sorry.  
Your right. I have a bunch of RPis all same type an version. But only one must be changed by my students to a RPi B+ 🥶  
And I took these and placed it in a closet. So I didn't recognize. - sorry and thanks

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [8 January 2022 10:42 UTC](https://discourse.nodered.org/t/node-red-in-a-sdcard-image-for-another-pi/56287/4 "2022-01-08T10:42:41Z")

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as long as they have the same or better processor then you can generally swap cards - so swapping from an arm6 to arm7 (pi1 to pi3) should work - but swapping back from say an arm7 to an arm6 is unlikely to work.

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**Author:** ![goony](https://avatars.discourse-cdn.com/v4/letter/g/59ef9b/32.png) [@goony](https://discourse.nodered.org/u/goony)\
**Post date:** [8 January 2022 18:31 UTC](https://discourse.nodered.org/t/node-red-in-a-sdcard-image-for-another-pi/56287/5 "2022-01-08T18:31:35Z")

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Yes, I see. Thank you.

I just thought to remember something about using a "key" in node-red to delete it to get node-red running.  
But it was some days ago and I'm not really sure.  
So a the moment everything is up and running fine.  
Thank you all!

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [9 March 2022 18:31 UTC](https://discourse.nodered.org/t/node-red-in-a-sdcard-image-for-another-pi/56287/6 "2022-03-09T18:31:59Z")

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