Today, I came back from work and my Mac Mini (intel) with Unraid was offline. Maybe because of a power outtake.

Now, it will not boot unraid anymore. Normally after a reboot, i press "Alt" to see the boot menu and to select "EFI boot". This selection appears, but after selecting it and hitting "Return", nothing happens for 5 seconds. After that, the Mac is booting from the internal hard drive (with macOS, not Unraid).

What can I do, Unraid is absolutly neccessary for my network. Please give me a hint!

Best regards

David

Do you have a current flash backup?

3 minutes ago, trurl said:

Do you have a current flash backup?

I have a Zip-File with the whole content of the USB stick. Which way can I copy it on another devices, that it will boot agaain?

The backup is old. Do I loose all th econfiguration work, when booting from that backup? (Oh no!)

Where do I find the configuration stuff on the Unrain Boot stick? Can I copy it seperatly to a fresh USB-Stick from the old backup?

Or can I execute the file "make_bootable" again without loosing the configuration?

Edited Tuesday at 10:19 PM4 days by DavidGoehler

The config folder from flash has all of your configuration and is all you need to get your configuration going again on a new install.

6 hours ago, DavidGoehler said:

I have a Zip-File with the whole content of the USB stick. Which way can I copy it on another devices, that it will boot agaain?

For a replacement stick choose a quality one, meaning an industrial USB flash drive.

@DavidGoehler I would start by plugging the flash drive into the Mac and checking it can be read there. If it can then it might be worth downloading the ZIP for your release and extracting all the bz* type files overwriting the ones on the current flash drive. This can sometimes fix a problem where it is due to not being able to read one of the standard system files from the flash drive. It would also give you a chance to backup the 'config' folder from the existing flash drive.

I fixed it the easy way: I made a backup using dd on a Linux machine, copied the image to another stick and did a "sudo fsck.vfat -a /dev/sdxx" on the original one.

The fsck stated:

There are differences between boot sector and its backup. This is mostly harmless. …

Dirty bit is set. Fs was not properly unmounted and some data may be corrupt. Automatically removing dirty bit. …

After that the repaired USB stick has booted Unraid without any problem and the system is running perfectly.

With this "experience" I will backup the stick on a regular basis in the future.

Thanks to all for your support!