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How to properly backup PI4?

  • Posts: 67
  • Thank you received: 3

Replied by jiberjaber on topic How to properly backup PI4?

I did a quick google and came across a link to this howto which includes how to shrink the image down

robotzero.one/headless-pi-zero-backup-clone/

Perhaps that's what you are after?
3 years 1 month ago #67839

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Replied by maxthebuilder on topic How to properly backup PI4?

This must be it - thank you!
The second card/drive has to be empty, right?
(I tried that utility a while ago - didn't work then for some reason...)
-- Max S
ZWO AM5. RST-135. AZ-GTI. HEQ5. iOptron SkyTracker.
TPO RC6. FRA400. Rokinon 135 and other lenses.
ZWO ASI2600MC. D5500 modified with UVIR clip-in filter.
ZWO ASI120MM Mini x 2. ZWO 30F4 guider. Orion 50mm guider.
ZWO EAF x 3.
3 years 1 month ago #67863

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Replied by AstroNerd on topic How to properly backup PI4?


The card you are copying too, does not need to be empty as it will get formatted as part of the copy process...
3 years 1 month ago #67867

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Replied by maxthebuilder on topic How to properly backup PI4?

I meant - if I put a previously backed-up card there which is also bootable - would the system not get confused by having two bootable cards/drives?
-- Max S
ZWO AM5. RST-135. AZ-GTI. HEQ5. iOptron SkyTracker.
TPO RC6. FRA400. Rokinon 135 and other lenses.
ZWO ASI2600MC. D5500 modified with UVIR clip-in filter.
ZWO ASI120MM Mini x 2. ZWO 30F4 guider. Orion 50mm guider.
ZWO EAF x 3.
Last edit: 3 years 1 month ago by maxthebuilder.
3 years 1 month ago #67868

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Replied by AstroNerd on topic How to properly backup PI4?


If you put a fully bootable card in the RPI slot, then yes I think it will boot from that SD card first....
3 years 1 month ago #67872

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Replied by Hy Murveit on topic How to properly backup PI4?

Of course, you can insert the card after the Pi is already booted, e.g. by using an SD Card reader connected to USB, so there would be no issue with booting from it.
3 years 1 month ago #67902

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Replied by maxthebuilder on topic How to properly backup PI4?

Ah... of course. Silly me.
Thanks!
-- Max S
ZWO AM5. RST-135. AZ-GTI. HEQ5. iOptron SkyTracker.
TPO RC6. FRA400. Rokinon 135 and other lenses.
ZWO ASI2600MC. D5500 modified with UVIR clip-in filter.
ZWO ASI120MM Mini x 2. ZWO 30F4 guider. Orion 50mm guider.
ZWO EAF x 3.
3 years 1 month ago #67903

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Replied by nou on topic How to properly backup PI4?

Running "sudo fstrim /" on SD card should erase free space on SD card so then you can run fastest compression so image would have similar size than real used space.

On my normal Linux desktop I run something like "dd if=/dev/mmbclk | gzip -0 > rspi-backup.gz" so it compress on the fly.
Last edit: 3 years 1 month ago by nou.
3 years 1 month ago #67906

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Replied by maxthebuilder on topic How to properly backup PI4?

I am a Linux idiot but will give this a try.
Thanks!
-- Max S
ZWO AM5. RST-135. AZ-GTI. HEQ5. iOptron SkyTracker.
TPO RC6. FRA400. Rokinon 135 and other lenses.
ZWO ASI2600MC. D5500 modified with UVIR clip-in filter.
ZWO ASI120MM Mini x 2. ZWO 30F4 guider. Orion 50mm guider.
ZWO EAF x 3.
3 years 1 month ago #67909

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Replied by nou on topic How to properly backup PI4?

Small mistake gzip accept only -1 as fastest compression not -0
3 years 1 month ago #67910

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Replied by maxthebuilder on topic How to properly backup PI4?

So, I got two USB sticks, booted from one, inserted the second one.
Launched SD Card Copier.
Now I have two drives in the list but they have exactly the same names!
Duh...
How do I tell which one is which?

Thanks!
-- Max S
ZWO AM5. RST-135. AZ-GTI. HEQ5. iOptron SkyTracker.
TPO RC6. FRA400. Rokinon 135 and other lenses.
ZWO ASI2600MC. D5500 modified with UVIR clip-in filter.
ZWO ASI120MM Mini x 2. ZWO 30F4 guider. Orion 50mm guider.
ZWO EAF x 3.
3 years 1 month ago #68040

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Replied by AstroNerd on topic How to properly backup PI4?


You should not use two identical drives.....they need to be different....and why two USB drives..?? Why not back up from the SD card...?
3 years 1 month ago #68056

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