How to I wipe the eMMC

AndyFraser

I am trying to install trueNAS onto the eMMC on my ME Mini but I am getting the error “Failed to find partition number 2 on mmcblk0”.
I am wondering if this is because Windows 11 is installed on it.
So, how to I wipe the eMMC completely?

Andy

Beelink CS-George

Hi there, here is the tutorial https://url.bee-link.cn/uRVH

pasta

Beelink CS-George This doesn’t help, the document instructions are for installing to another ssd, not to the internal emmc which is giving an error.

Flixty

Hi !
I have exactly the same problem with the same error message. And I strictly followed the instructions for the installation of TrueNAS.
Is the anything to do in the BIOS or the disk manager in Windows 11 ?
Thanks !

Flixty

PS : I saw a curious manipulation on YouTube :
Is it necessary ?

Beelink CS-George

We will test if truenas can be installed on EMMC . We will keep you updated

Beelink CS-George

After testing on our end, we’ve confirmed that the same problem can occur initially, but we successfully installed the system on the eMMC on our second attempt.
Could you please try a second installation? This often helps bypass the issue, and we hope it will work smoothly for you as well.
If you still run into trouble after the second attempt, feel free to let us know—we’ll be happy to provide further assistance.

HellblazerUK

Hello there!

I had the same issue when attempting to install TrueNAS on the eMMC drive.

It took me 4 installation attempts one after the other with no reboots. Eventually it correctly partitioned and formatted the drive. Just be patient and keep trying - eventually the installation will complete.
I also tried a second time just to check and again it took a few attempts (3 on this occasion). I have heard that multiple attermpts are required due to eMMC being very slow to present partitions to the O/S (up to 30 seconds or so). This may be hearsay but it seems to be accurate.

bal

FYI - I had start the install procedure 5 times

Silverthorn

This is a known problem with the TrueNAS installer. See https://forums.truenas.com/t/installation-failed-on-emmc-odroid-h4/15317/39 for some possible workarounds. I am still looking for a solution.

rafaelakutch

Silverthorn This is a known problem with the TrueNAS installer. See Sprunki Game https://forums.truenas.com/t/installation-failed-on-emmc-odroid-h4/15317/39 for some possible workarounds. I am still looking for a solution.

Oh i have the same problem!

Silverthorn

I followed the advice on the previous link and eventually got it going. The last things I tried were the “dd if=…” line and then ctrl-alt-f6 to return to the menu and try the install again, but I suspect it was a combination of some of the previous attempts with the last attempt.

Johan1701

Hi all, had the same issue.
Did this:

Boot the install-usb-stick (or what ever bootdevice you are using)
Start the install in the TextGUI, choose the eMMC disk, in my case mmcblk0, choose webgui or the other, doesnt matter, it fails anyway… Otherwise you wouldnt be reading this. :)
When it fails, it reverts back to first install TextGUI screen.
Choose Shell
Type: sgdisk -Z /dev/mmecblk (or whatever your device is, use lsblk to have a look) and enter.
This wipes the partition table on the disk, soo dont save anything of value on it. But you probably knew that. :)
Then type sync; partprobe and enter
Check that the mmcblk0 part in lsblk now is partitionless. It should be,
Type exit to start the TextGUI again, and try the Install/upgrade choice, the same sequence again, and it should start copying.

This worked for me and a friends ME Mini hardware.

Good Luck, and may the NAS be with you…

//Johan, ME Mini newbie, otherwise senior server knowitmost 😉