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  • green LED flashes 4 times - rpi B 3+ but works USB-boot

    From =?UTF-8?Q?Bj=c3=b6rn_Lundin?=@3:770/3 to All on Tue Jan 12 22:03:38 2021
    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 <https://www.amazon.se/dp/B077QTGTDV?ref_=pe_20773151_507143461_E_301_dt_1>

    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


    --
    Björn

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
  • From Chris Elvidge@3:770/3 to All on Wed Jan 13 14:07:56 2021
    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 <https://www.amazon.se/dp/B077QTGTDV?ref_=pe_20773151_507143461_E_301_dt_1>

    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

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
  • From =?UTF-8?Q?Bj=c3=b6rn_Lundin?=@3:770/3 to All on Wed Jan 13 19:10:47 2021
    Den 2021-01-13 kl. 15:07, skrev Chris Elvidge:

    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.


    Well, yes, hmm how could I miss that?

    the boot order is at <https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/bootf low.md>

    with a comment

    "If there is no SD card inserted, the SD boot mode takes five seconds to
    fail. To reduce this and fall back to USB more quickly, you can either
    insert an SD card with nothing on it or use the GPIO bootmode OTP
    setting described above to only enable USB."

    So I halted, inserted a small empty one and boot and now no more
    flashing. Thanks


    --
    Björn

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)