Hi folks,

updated to 7.3.0 and now i cant access the GUI - but the ssh is working...

I disabled Docker over docker.cfg, rebooted but no luck.

Is this a known issue?

horus-diagnostics-20260517-1227.zip

Edited May 17May 17 by Zonediver

Please check here, is the USB partitioning basically [DIAGNOSED + WORKAROUND] 7.3.0: emhttpd ENOFLASH4 — flash rejected, GUID = (null) on legacy whole-device FAT (superfloppy) USBs - General Support - Unraid

14 hours ago, opixo said:

Please check here, is the USB partitioning basically [DIAGNOSED + WORKAROUND] 7.3.0: emhttpd ENOFLASH4 — flash rejected, GUID = (null) on legacy whole-device FAT (superfloppy) USBs - General Support - Unraid

I added the diagnostics - maybe its helpfull...

Flash drive doesn't have the correct layout, 7.3 is more strict about that.

Back up the current one, recreate it using the USB tool, then restore only the config folder from the backup.

40 minutes ago, JorgeB said:

Flash drive doesn't have the correct layout, 7.3 is more strict about that.

Back up the current one, recreate it using the USB tool, then restore only the config folder from the backup.

What "exactly" does this mean???

Its FAT32 formated with only one partition...

How is 7.3.0 handling this?

In the past, i unziped the new version, copied it to the USB-Flash, executed "make_bootable.bat" as admin and done!

USB was FAT32 formated and labled "UNRAID".

Is this procedure not longer working with 7.3.0?

Edited May 17May 17 by Zonediver

I had the exact same problem....

Just tried to upgrad my DXP6800Pro to 7.3 and:
- I can't connect to the GUI despite the terminal/console showing the right IP adress
- Booting into Safe mode (no plugins) with or without GUI doesn't work...so it's not plugins ? It gives me the "Unraid Login" with the hypervisor error - but I don't think it's the VMBackup plugin errors because...safe mode ?
- RE-updating fails every time.

Thank the lord of the "previous folder" and easy rollback, I was able to simply plug my USB key into another computer and restore 7.2.5...

Can it also be the USB partitionning ?

Thanks for the help !

unraid-diagnostics-20260513-2101.zip unraid-diagnostics-20260513-2109.zip

Edited May 18May 18 by LGFS
Removed links, attached diags

12 hours ago, LGFS said:

Here are a bunch of diagnostics from all attemps (safe mode etc)

Please attach one of them to this thread.

21 hours ago, Zonediver said:

Its FAT32 formated with only one partition...

Not according to the syslog:

May 17 12:26:25 Horus emhttpd: online: Lexar_JD_FireFly_AADEO33DRWIDXKE6-0:0 (sdj) 512 15663104 => no partitions

If you do what I mentioned above, it will almost certainly resolve the problem

3 hours ago, JorgeB said:

Please attach one of them to this thread.

Added the last two, absolutely didn't see the file upload bar at the bottom of the posts, shame on me...
Thanks !

22 minutes ago, LGFS said:

Added the last two

It's a problem with the flash drive layout, 7.3 is more strict about that, this should resolve it

23 hours ago, JorgeB said:

Back up the current one, recreate it using the USB tool, then restore only the config folder from the backup.

2 hours ago, JorgeB said:

Not according to the syslog:

May 17 12:26:25 Horus emhttpd: online: Lexar_JD_FireFly_AADEO33DRWIDXKE6-0:0 (sdj) 512 15663104 => no partitions

If you do what I mentioned above, it will almost certainly resolve the problem

Of corse there are no partitions - the whole stick was formated as FAT32 and had a running 7.2.4 on it.

How is it possible that an update destroys the whole funktion of the USB-Flash?

Edited May 19May 19 by Zonediver

15 minutes ago, Zonediver said:

Of corse there are no partitions - the whole stick was formated as FAT32 and had a running 7.2.4 on it.

How is it possible that an update destroys the whole funktion of the USB-Flash?

As i said before: This realeas (7.3.0) is not finished yet and seems more like a Beta...

I think the fact it worked without a partition was by accident. Using the USB Creator tool would result in a partitioned flash drive, and I think the online documentation for doing it manually also said it should be partitioned.

1 hour ago, itimpi said:

I think the fact it worked without a partition was by accident. Using the USB Creator tool would result in a partitioned flash drive, and I think the online documentation for doing it manually also said it should be partitioned.

Interesting...

For the older past unraid versions the docs said, format the USB under Windows with FAT32 and copy the Files to the Flash.

If this process is no longer working, it should be mentioned at the docs that the new USB-Tool is a "mandatory requirement".

Edited May 18May 18 by Zonediver

1 hour ago, Zonediver said:

As i said before: This release (7.3.0) is not finished yet and seems more like a Beta...

It is a point release, edge cases like yours might slip through the cracks... The solution is a easy fix. My advice is wait for the X.X.1 update if you really want to be safe.

8 minutes ago, Zonediver said:

For the older past unraid versions the docs said, format the USB under Windows with FAT32 and copy the Files to the Flash.

That still works if the flash drive is correctly formatted with a single FAT32 partition.

1 hour ago, Zonediver said:

Of corse there are no partitions - the whole stick was formated as FAT32 and had a running 7.2.4 on it.

If it was correctly formatted with FAT32 Unraid would correctly detect the partition.

24 minutes ago, JorgeB said:

That still works if the flash drive is correctly formatted with a single FAT32 partition.

If it was correctly formatted with FAT32 Unraid would correctly detect the partition.

I did it like the past 16 years over Windows - i am not really sure, what else i could do...

I tried it a second time - i took the USB-Stick out of the server, connected it on my Win PC and did a "real" format.

After copying the Files back and startet unraid, i got the same result... no WbGUI (but ssh).

So this must be a deeper problem - either from Win 11 or something else...

Edited May 18May 18 by Zonediver

8 minutes ago, Zonediver said:

I did it like the past 16 years over Windows - i am not really sure, what else i could do...

I tried it a second time - i took the USB-Stick out of the server, connected it on my Win PC and did a "real" format.

After copying the Files back and startet unraid, i got the same result... no WbGUI (but ssh).

So this must be a deeper problem - either from Win 11 or something else...

Just curious what does windows device manager show when the usb is attached to the windows pc?

Just now, MowMdown said:

Just curious what does windows device manager show when the usb is attached to the windows pc?

Nothing unusual - just a single FAT32 partition - thats it...

Yesterday, i created a new USB-Flash with the USB-Tool for unraid (to see, how it works) and this stick shows exactly the same infos under Win11 - a single FAT32 partition (active, primary)

There is no (obvious) difference - thats the confusing part...

Edited May 18May 18 by Zonediver

4 hours ago, JorgeB said:

It's a problem with the flash drive layout, 7.3 is more strict about that, this should resolve it

I can confirm that backup + quick-formatting the same exact key in Windows + [manually copying 7.3.0 + config folder] + "makebootable" solved the problem.

I chose manual copy because the unraid creator tool didn't work with my usb key (Sandisk) - the same USB key that perfectly works and holds my licence when inserted into my NAS...

Thanks @JorgeB for helping diagnose the problem, I'll crosspost into 7.3.0 as well.

Edited May 18May 18 by LGFS

17 minutes ago, Zonediver said:

Nothing unusual - just a single FAT32 partition - thats it...

Yesterday, i created a new USB-Flash with the USB-Tool for unraid and this stick shows exactly the same infos under Win11...

A single FAT32 partition (active, primary)

There is no (obvious) difference - thats the confusing part...

Yes, I just did a quickformat in windows and now it works... Complete mystery, just happy it's quite easy to just move the config folder tho.

Did you skip the "makebootable.bat" step by any chance ?

1 minute ago, LGFS said:

Did you skip the "makebootable.bat" step by any chance ?

No - this step is mandatory - otherwise unraid will not boot.

The partition layout may not be exactly correct, or there's some other issue that is preventing Linux utils from detecting it correctly; just recreate it, and it will resolve.

17 minutes ago, Zonediver said:

No - this step is mandatory - otherwise unraid will not boot.

Note that makebootable is only needed if still booting legacy; it's not needed to UEFI boot.

An alternative way to create an Unraid compatible flash drive, for anyone not wanting to use the USB tool is with RUFUS:

- Open Rufus and change "Boot selection" to "Freedos"

- Set the "Volume label" to UNRAID

- set filesytem to FAT32

- click START

- once done, unpack the Unraid ZIP to the flash drive

If you are booting UEFI nothing else you need to do, if you are booting legacy/CSM, run the make_bootable.bat as administrator first.

Just now, JorgeB said:

Note that makebootable is only needed if still booting legacy; it's not needed to UEFI boot.

I know - thats why i said "mandatory".

My system is running in legacy mode.

Edited May 18May 18 by Zonediver

3 minutes ago, JorgeB said:

just recreate it, and it will resolve.

I already did this... with no luck - boot yes, but without the WegGUI and only with ssh.

Thats the "strange" part...

Edited May 18May 18 by Zonediver