HectorG

Bit more insight into this issue and a fix for startup.nsh uefi shell appearing constantly :

probably not of much help but usb controllers seem to be hit and miss for many (espeically amd ryzen owbers) and even then it feels usb controllers even when in seperate groups appear to still be sharing from the other usb controllers on the mobo causing other issues and instability. I see why space invader vid he just bought a usb controller card and passed that through so reduced the headache, gonna do same shortly.

Ok I fixed the issue (I have same issue as yourself) Rachid told me to use a special bootloader modded bios (clover) iso file as the primary vdisk instead of it being set to none(space invader made it in his video and shows same thing), then you can tick the nvme drive in other pci devices as normal and also click the + sign under primary disk to add 2nd vidsk such as unassigned disk or other drives as normal. This forces windows 10 template to boot off the nvme drive using the modded clover iso, startup.nsh is gone now. Here is the link to info: Hopefully this fixes the issue for the rest of the unraid users having startup.nsh or boot issues with nvme pass through.

Thank you very much rachid596 ! (and to space invader) it worked with that modded clover bios bootloader iso file. Instead of adding primary vdisk location = none, I chose manual and selected the clover bootloader.iso (download link in space invaders vid above) then I clicked + sign to add my 2nd vdisk location and selected my unassigned disk as normal (or add any other hdd or device) Booted it up several times to make sure but no more startup.nsh error. Unraid does save the bios savings what I found was setting primary vdisk to none (to pass through the nvme drive) and then adding a 2nd vdisk (assigned device hdd) the unraid vm template was then assuming since there was no primary hard drive (was set to none) it was defaulting to the 2nd vdisk causing the startup.nsh boot loop error. Using the clover bootloader bios.iso file in primary vdisk gives the vm windows template a location to boot as well as being a better modded bootloader to allow nvme to correctly pass through. I wish space invader would do a small video of an up to dated nvme pass through video with vfi plugin + using the clover bios bootloader iso, otherwise its gonna be hell when others try to do vfi without the clover bios or vice versa, I will link this post to the other thread where the other unraid users are having same or similar issues hopefully should fix it for them too.

thanks I did see this video a while back but noticed maybe this is relevant to older unraid builds, the ytube comments suggested using a clover bios was not required anymore since the ovmf bios can support uefi and nvme boots (although I think its buggy since it wont save after a reboot). Still I will give it a try since this issue still exist as noted also over here these guys modded the xml to tell it to boot directly off the nvme drive but some had issues with passing through other unassigned devices. https://forums.unraid.net/topic/83515-forcing-boot-order-w-nvme-pass-through/ I will have to try all of them and see what works.

Hi did you have any joy with this issue ? I still have this issue sadly to me it feels like the bios is not saving the boot order, when you get startup.nsh shell error and type exit and change boot order and save it, it 100% saves since if you click resume/continue it boots to your nvme drive but..... if you shut down and restart it defaults the original incorrect bios. To me it almost feels like a bug in the vm virtual bios regardless of q35 or i440 etc I posted here also: Some suggested using a clover modded bios, never heard of this but will also try this soon. I believe there maybe a temp solution to forcing the VMs q35 or i440x bios to directly boot off your nvme device but my xml/linux command work is not that good but it involves editing the startup.nsh file: https://wiki.unraid.net/index.php/UnRAID_OS_version_6_Upgrade_Notes#My_OVMF_VM_doesn.27t_boot_correctly I did add these lines into my startup.nsh file: fs0: cd efi/boot bootx64.efi but it claims it cannot find the files, even though I can manually go through each folder and file and run it and boot fine. unraid wiki mentions OVMF has this boot issue with VMs but also says like many its a 'one time' boot, this is not the case with myself and many others. Almost feels like a bug within unraid with the bios settings not being saved or the VM template needs a boot order option to tell the VM which devices to boot off first?

These may not work since I am new to unraid but I did have the error 43 myself, try these: I had to disable Legacy bios or CSM in the motherboard bios then the error 43 went away and my Nvidia card worked fine. GPU pass through does not work with those it has to be UEFI bios only, also when creating your VM template in unraid do not use seabios since its legacy/csm mode (so wont pass through gpus) it has to be set to OVMF only since that supports UEFI bios and GPU pass through. You should also use your correct gpu bios of your gpu card and make sure it's been edited correctly, otherwise if it's not been edited it won't work either for pass through. Ytube space invader has the vids for that and shows you how to edit the rom file. also this may not help but I did all the above and had a blank screen when my VM started I followed jt rippers instructions here: and applied a script fix, this allowed my gpu to display and work also. Again not sure if it helps but maybe worth a look.

I have a strange issue with VM windows 10, I am running VM directly off an internal nvme ssd (with windows 10 already) Nvidia gpu pass through all works well but I get the startup.nsh bios message each time I start the vm. I can type exit, select boot manager and select my uefi nvme intel ssd and it boots fine to windows and runs well but obviously it's not nice to do this every single time I switch on Windows 10vm. I have already tried to delete the boot order entries and leave just my uefi nvme intel ssd as the only boot device or like the first or only boot device to exist, saved changes to bios and clicked resumed this works but its temporary, soon as I restart back I get startup.nsh screen its like the bios does not remember the boot order or changes I made. Tried also changing boot order to point to only uefi intel nvme drive, same effect. Tried win 8.1 and 7 templates, intel 44x machine bios and q35s, I have to use ovmf since I require gpu pass through so seabios is not a solution for me but from the other threads that was mentioned as a fix. Anyone seen this error or have any idea ? feels like I need force & save the bios to point to my intel nvme drive since it's not being saved.

Had this exact error and then figured since the nvme drive is enabled and checked within the vm template to just go back to that busted or bad VM template and then uncheck NVME drive in the other pci devices section or just uncheck any usb or pci express devices and hit apply. Now you should be able to simply delete the vm without any error message. Unraid is so logical that if you try to 'Windows' it, it won't forgive you for being stupid and it will just tell you off, but if you think like spock unraid just works.

Well was just about to post my cure to the deadful nvidia code 43 error but Dangerous above posted it. I too have an 3800x AMD system and Nvidia card, I had switched to CSM to fix unraid gui getting a blank screen but when I ran the VM win10 it came up with code 43 and a giant screen. Luckerly I recalled I changed that bios setting since it was working last week fine so knew switching CSM in my bios to OFF was perhaps going to fix it and it did. Something to note however is not all bios of mainboards call it UEFI mode or Legacy mode anymore, my motherboard calls it CSM which I believe is legacy mode. Looking back on the last 4 pages id bet the whole UEFI, Legacy, CSM mode is causing the code 43 error so give it a try I believe its due to Windows 10 and gpus being installed via UEFI mode and not legacy/CSM.

It 100% is for myself, I have watched probably 20 space invader vids and read many pages on the forum (probably overkill in terms of newbie) and just feel I have spent more time trying to get the flash stick set up correctly then using unraid itself. Even with the above hackery to rename to UNRAID it did not work for me, but then I noticed it is my fault or the unraid wiki is not fully clear, the Manual method of creating the unraid stick (copying over the zip etc) only works if you are in legacy bios mode, my bios does not have any legacy mode written anywhere but then I found its also known as CSM. So I disabeled CSM and the stick boots fine. The only issue is I can't have CSM enabled since when I pass through my GPU on my VM I discovered I get the dreaded Code 43 gpu fault but switching off CSM in bios my gpu can pass through the nvidia card fully without error (I will update the code43 thread with my findings may help others) So I still remembered others on here used a old pc, tried it on a 10 year pc and unraid creator created it perfectly on a sandisk usb stick and the corsair! So only took 3-4 weeks to fully get a usb stick running. I also read usb2.0 flash are more reliable but I used a magazine freebie one and while it passed multi write read/write test, I think its a dodgy stick maybe the cheap or free ones are a reason ! so ill digress and say cough up get a good quality flash drive. Its perhaps a bit of old guides getting out of date, seems UEFI, Legacy/CSM and usb3.0 flash are also problematic, maybe its better to flash on an stick on an usb 2.0 port on a 10 year old computer. Really at this point I just want to see if unraid is stable enough to move full time, which I believe it is.

ran into this issue also but sure enough as it hangs on sync I went back to windows explorer renamed pen drive to UNRAID and it began copying correctly. I ran the unraid usb creator as admin also but still had to do the above.

Oh thanks I must be mistaken, thought I heard of hotter temps with AMD cpus and unraid good to hear this is not the case.

pretty good video here: I currently am having usb controller issues (its possible but bit tricky to isolate and pass through-needs some work) since I am new to unraid I may actually just get a usb 3.0 pciexpress card there cheap and since it's an separate device should be more headache free, I too have issues with my usb soundcard dac/amp sometimes does not get detected even despite being listed in device manager or no power. I recommend getting one with additional power to help drive powerful usb devices.

Hello I am new to unraid and just read this excellent post, I own a AMD 3800x and Asrock 570x mobo so think I have spotted some of these issues (mainly trying to vfi onboard sound to win10 vm crashing it and crashing unraid), I think I can avoid the onboard audio (I use an usb external soundcard) and can get a usb controller seperate card to solve any usb pass through issues. Is there a problem with unraid and AMD cpus/X570 with hot cpu temps or is this false temp readings ?