Upsating Firmware not possible: Error mounting USB drive  

RE: Upsating Firmware not possible: Error mounting USB drive

@jost

Happy to help!

RE: Upsating Firmware not possible: Error mounting USB drive

@jost

Very interesting information. I have been using industrial Kingston SD and Micro SD cards for many years and I am very satisfied with them. They are a bit more expensive but they work reliably.

RE: Upsating Firmware not possible: Error mounting USB drive

I had a problem with updating my MINI firmware with the attached 8 GB pendrive - the printer kept showing "#4 error mounting USB drive" every time I restarted the printer. I tried other pendrives and all of them resulted in the "#7 error mounting USB drive" instead.

I've finally  managed to finally flash the latest 4.3.0 firmware by using other pendrive - not the attached one. However, instead of GPT partition table which is commonly used nowadays, I've used MBR. The 8 GB pendrive that came with the printer is partitioned with MBR table out of the box, but I guess its #4 error is caused by something else (maybe hardware fault?), while the #7 error seems to be connected with the GPT table being used. What's interesting, once the system boots, both the MBR and GPT pendrives are read properly and it's possible to print from them. That'd make sense for Marlin to support both partition table layouts, since it's the actual operating system and can have much more features stuffed in than the bootloader itself.

Too bad there is no mention of the partition table that should be used with Prusa printers in the help pages - the only mention is about FAT32 being the required filesystem. There is a talk about using MBR in the comments of that page, but including information about required partition table in the the actual page content would make it much easier to find, especially since it's the first thing bootloader and system need to actually find the partition itself. 😛 

Hope that it'll help somebody. 😀

RE: Upsating Firmware not possible: Error mounting USB drive

@konpon96

And how we do  this change? From GPT to MBR

Thanks in advance

RE: Upsating Firmware not possible: Error mounting USB drive

@cordeiroartur

On Windows you can format your pendrive from scratch with Diskpart in such a way that it uses MBR. Open Powershell with admin privileges, type in diskpart and type in the following commands:

list disk
select disk <number of pendrive from the list displayed by the previous command>
convert mbr
create part primary
format fs=fat32 quick

Remember to backup the pendrive content before though, since it will wipe it. Also, be careful about the number of the disk from the list disk output - if you chose a wrong one, you might end up wiping other disk with your data. Once you execute these commands, you can quit the Powershell window and move the firmware update file to the pendrive.

RE: Upsating Firmware not possible: Error mounting USB drive

I tried different type of usb disks (4GB nameless, 8GB SanDisk, 64GB Kingston sdcard in usb adapter) ... all of them resulted in #7 error.

All of them were quick (!!) formatted MBR FAT32 4K unitsize.
After reformatting without quick the Prusa Mini was able to update the firmware!!

Just luck? Or was reformatting without quick the solution?

RE: Upsating Firmware not possible: Error mounting USB drive

Hi all, I was in the same situation: impossible to update my Prusa Mini Firmware.

I tried 4 USB sticks before finding one that works: a Lexar microSD 16GB with a microSD to USB adapter. I tried to convert one of the USB drives with Diskpart (thanks Konpon96) but I get this error: Virtual Disk Service Error: The specified disk is not convertible.

So for now I'm using my small microSD card to update the FW and my normal USB stick (Kingstom 8GB) to print but I feel bad about it. I hope I never lose my microSD...

RE:

I had a similar issue: updating from 4.1.3 to 5.1.2: the usb key would not be recognised. 

Double click on boot would bring #2 error reading USB disk

I tried two different USB drives: 32BG LaCie and 16GB Kingston partitioned in MBR FAT 32 in Disk Utility -> same issue the sticks are not recognised.

Then I found an old 2GB SD card  from the 2000's formatted in FAT 16  and I could update the bootloader and firmware to 4.4.1 with it.

After 4.4.1, I tried to use the LaCie to update to 5.1.2 . It was ignored on restart and when double clicking on reboot I got a red screen with error" the disk cannot be read, reformat ... 

So I used the same 2G SD to update to 5.1.2  successfully.

Is FAT 16 the requirement to flash the Prusa mini ? I have an original Mini ordered when it was released, not the Mini+