Upsating Firmware not possible: Error mounting USB drive
 
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DMG
 DMG
(@dmg)
New Member
RE: Upsating Firmware not possible: Error mounting USB drive

@jost

Happy to help!

Posted : 04/02/2021 4:01 pm
karl-herbert
(@karl-herbert)
Illustrious Member
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.

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.

Posted : 04/02/2021 4:15 pm
Konpon96
(@konpon96)
New Member
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. 😀

Posted : 06/02/2021 10:33 pm
cordeiroartur
(@cordeiroartur)
New Member
RE: Upsating Firmware not possible: Error mounting USB drive

@konpon96

And how we do  this change? From GPT to MBR

Thanks in advance

Posted : 19/03/2021 9:33 am
Konpon96
(@konpon96)
New Member
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.

This post was modified 1 year ago by Konpon96
Posted : 19/03/2021 4:21 pm
dschelte
(@dschelte)
New Member
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?

Posted : 18/01/2022 4:01 pm
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