On 12/01/2021 09:03 pm, Björn Lundin wrote:
>
> Hi!
>
> I have for a long time run a rpi 3B+ by having
>
> /boot
> /
>
> on the SD card
> and all application specific stuff on a small
> (80 GB) USB-disk 2.5" spinning metal
>
> So the other day I bought a 120 GB SSD disk at amazon
> 
>
> And I use gparted on another Linux box to
> - clean out the new SSD
> - copy /boot from SD card and paste on SSD
> - copy / from sdcard  and paste on SSD
> - copy /bnlbot from old USB-drive and paste on SSD
>
> The whole procedure was very smooth - I did not know of copy/paste
> within gparted before.
>
> in /boot/cmdlie,txt I changed the root UUID
> in /etc/fstab I did the same, changing UUID and PARTITIONUUID
> to new values.
>
> Nice - unmount from PC and put SSD in rpi via USB - with no SD card
> Power on
>
> LED flashes 4 times - seem to mean
>
<https://elinux.org/R-Pi_Troubleshooting#Green_LED_blinks_in_a_specific_pattern
>
>
>
> * 4 flashes: start.elf not launched
>
> But - the PI works,
> I can SSH to it
> the database works,  my applications has started.
>
> dmesg confirms boot from USB (well there is no SD-card so)
>
> Everything but the LED seems fine
>
> Why does it flash?
> I cannot google an answer to make it not flash
>
>

 From the above reference:

Note that 4-flashes may point to a defective SD-card holder, if one or
more of the data contacts is intermittent it can lead to this problem.

"No SD card" probably can't be differentiated from "Bad SD card holder"
as no contact with SD card.



--
Chris Elvidge
England

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