Problem: Printer will not use USB flash as swap while running Klipper13

[Zach-Z0]

Printer Model

AD5M

Screen / Interface Type

I use GuppyScreen

Klipper Version

I use Klipper 13

Web Interface

Fluidd

Start G-code

START_PRINT EXTRUDER_TEMP=[nozzle_temperature_initial_layer] BED_TEMP=[bed_temperature_initial_layer_single]
M190 S[bed_temperature_initial_layer_single]
M104 S[nozzle_temperature_initial_layer]
SET_PRINT_STATS_INFO TOTAL_LAYER=[total_layer_count]

End G-code

END_PRINT

Detailed Problem Description

1. Selected a suitable USB drive to format (Used 2.0, 3.1, and 3.2 variants, 2gb, 32gb, 64gb, various manufacturers)
2. Format USB drive using "Rufus", FAT32 file system, MBR partition format.
3. Ensure "ZMOD_SAVE_DATA SWAP_ON" value = 2
4. Power off printer completely, wait 15 seconds.
5. Insert FAT32 formatted USB flash drive
6. Power on printer, wait for it to boot fully
7. SSH into printer
8. use 'cat /proc/swaps/' command to check location of the swap
9. Note if the swap is still located in the eMMC (/data/.mod/.zmod/root/swap) or on USB flash drive (/media)
10. Verify if the linux system is even aware of the USB flash drive existing with "df -T" command
11. Note if the USB flash drive appears in the file system (It has every time).

Issue has been tested with 2gb (USB 2.0), 32GB (USB 3.1), 64GB (USB 3.2) sticks, all results the same. Have asked other Zmod users to run the same test for me, one running klipper11 had no issues, another person running klipper13 could not get a flash drive to be used as swap either. All USB drives across all tests were 100% confirmed to be formatted "FAT32" or "Large Fat32" (depending on the size of the drive) with MBR partition format. User running klipper11 had success with a 64gb flash drive formatted "Large Fat32".

Attach config-*.tar.gz file

config_1.7.1-30.tar.gz

Attach GCODE file

Not applicable.

[github-actions]

✅ Perfect! The file config_1.7.1-26.tar.gz has been found, is accessible, and contains the required structure.

✅ Отлично! Файл config_1.7.1-26.tar.gz найден, доступен и имеет корректную структуру.

Version Check / Проверка версии: Your mod version 1.7.1-26 is up to date.

The issue has been (re)opened and will be processed. / Тикет был (пере)открыт и будет обработан.
https://wiki.zmod.link/ru/Help/
https://wiki.zmod.link/Help/

[github-actions]

✅ Perfect! The file config_1.7.1-26.tar.gz has been found, is accessible, and contains the required structure.

✅ Отлично! Файл config_1.7.1-26.tar.gz найден, доступен и имеет корректную структуру.

Version Check / Проверка версии: Your mod version 1.7.1-26 is up to date.

The issue has been (re)opened and will be processed. / Тикет был (пере)открыт и будет обработан.
https://wiki.zmod.link/ru/Help/
https://wiki.zmod.link/Help/

[github-actions]

✅ Perfect! The file config_1.7.1-26.tar.gz has been found, is accessible, and contains the required structure.

✅ Отлично! Файл config_1.7.1-26.tar.gz найден, доступен и имеет корректную структуру.

Version Check / Проверка версии: Your mod version 1.7.1-26 is up to date.

The issue has been (re)opened and will be processed. / Тикет был (пере)открыт и будет обработан.
https://wiki.zmod.link/ru/Help/
https://wiki.zmod.link/Help/

[ghzserg]

1. Using the swap file on a flash drive is not recommended. In 90% of cases, a flash drive is slower than the built-in memory. This will cause Clipper to crash.
2. Using Guppy Screen manages flash drives differently, and therefore, when working with Guppy, the swap file on the flash drive is not used.

[Zach-Z0]

Hello, thank you for taking the time to reply to my issue/inquiry.

Thank you for clarifying that this is an issue with Guppyscreen, not klipper13.

I understand the risks associated with using external flash drives and how unreliable it can make the system as I've read your documentation on the matter, I know it is not recommended. However the reason I reported the problem was because the feature cannot be enabled at all, should I choose to accept these risks and use a flash drive anyways.

Are you saying this is intentional behavior from the mod and not a bug, therefor you have no intention of ever letting the user decide on their own?

Thanks for clarifying.

[Zach-Z0]

Closed issue by mistake.

[github-actions]

✅ Archive Check Passed / Проверка архива пройдена
The file config_1.7.1-26.tar.gz is valid. / Файл config_1.7.1-26.tar.gz корректен.

🔴 Action Required / Требуется действие: Your mod version 1.7.1-26 does not match the latest version 1.7.1-30.

🚫 Issue Status / Статус тикета:
This issue will remain closed until the mod is updated to the latest version.
Тикет останется закрытым до обновления мода до последней версии.

🔄 Please update your mod first! / Сначала обновите мод!

• Update guide (English): https://wiki.zmod.link/Setup/#updating-the-mod
• Инструкция по обновлению (Русский): https://wiki.zmod.link/ru/Setup/#обновление-мода

After updating, please edit this issue (no need to create a new one). The check will run again and reopen it if the version matches.
После обновления отредактируйте этот тикет (создавать новый не нужно). Проверка запустится снова и откроет его, если версия совпадает.
https://wiki.zmod.link/Help/
https://wiki.zmod.link/ru/Help/

[github-actions]

✅ Perfect! The file config_1.7.1-30.tar.gz has been found, is accessible, and contains the required structure.

✅ Отлично! Файл config_1.7.1-30.tar.gz найден, доступен и имеет корректную структуру.

Version Check / Проверка версии: Your mod version 1.7.1-30 is up to date.

The issue has been (re)opened and will be processed. / Тикет был (пере)открыт и будет обработан.
https://wiki.zmod.link/ru/Help/
https://wiki.zmod.link/Help/

[ghzserg]

The current behavior is a bug.
But I don't have time to fix it,
because it only occurs in the GuppyScreen configuration.
And in 99% of cases, users who placed the swap file on a flash drive returned to the EMMC after a series of unsuccessful stamps.
The functionality for placing the swap file hasn't been completely removed from the mod, because once a month there's always someone who suggests placing it there.
That's why this functionality is left in the mod, not removed.
You can add the code to create the swap file.
mod_data/power_on.sh

    if grep -q "use_swap = 2" ${MOD_CONF}/mod_data/variables.cfg && [ ${AD5M} -eq 1 ]; then
        for i in `seq 1 6`; do mount |grep /media && break; echo $i; sleep 10; done;

        if mount |grep /media; then
            FREE_SPACE=$(df /media 2>/dev/null|grep -v /dev/root|grep -v Filesystem| tail -1 | tr -s ' ' | cut -d' ' -f4)
            MIN_SPACE=$((128*1024))
            mount
            df /media

            if [ "$FREE_SPACE" != "" ] && [ "$FREE_SPACE" -ge "$MIN_SPACE" ]; then
                SWAP="/media/swap"
                if ! [ -f $SWAP ]; then dd if=/dev/zero of=$SWAP bs=1024 count=131072; mkswap $SWAP; fi;
                swapon $SWAP
            fi
        fi
    fi

Just replace media with the path where the flash drive is mounted.