boot pcs with proxmox via pxe from serva in an proxmox vm

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rapalle

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Aug 27, 2025
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i have a nas running with proxmox, one of its vms runns serva, it should let my diskless pcs boot with proxmox and automaticly installs it and hooks it up to the datacenter. but everytime the pc says
LINUX26 check, INITRD.IMG check, [error] no device with valid ISO found.
can somebody pls help me, i dont know what to do
 

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I'm having kind of the same issue, but the reason for this is that the Debian/ProxMox kernel doesn't include the loopback module. You have to unpack the initrd.img and throw in your ProxMox ISO renamed to, "proxmox.iso." Repack, and then add the new image with included ISO to your TFTP/Web server.

This is what I get after and am trying to work out. I have 16GBs set for RAM_Disk, but get this error:

1756824285218.png

And here's my Grub.cfg config:

1756824362102.png

I need some help, too!
 
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After repacking the initrd file with the proxmox iso my grub line looks like this and it boots.

Code: 
linux pxe/proxmox/linux26
initrd pxe/proxmox/initrd.img
 
@Chris Carby correct I did not specify ram disk settings.

Full disclosure, I haven't used a "grub based" pxe booting method for a long while now. I quickly tested my old grub pxe setup and that line still booted proxmox (8 and 9) via pxe.
 
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generalproxuser said:
@Chris Carby correct I did not specify ram disk settings.

Full disclosure, I haven't used a "grub based" pxe booting method for a long while now. I quickly tested my old grub pxe setup and that line still booted proxmox (8 and 9) via pxe.
Click to expand...
I tried this. Unfortunately, I still get the same. "error: out of memory"

SuperMicro Superserver (without a BMC license...smh...this is what has sent me down this rabbit hole of an adventure)
128GB RAM
XEON Golds
no VROC key
2 x 512 m.2
5 x 1TB SAS drives

Boot loader is GrubX64.efi
Fallback is BootX64.efi
 
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Interesting. I am able to pxe boot the proxmox installer with a vm (and real hardware) that runs 16GB ram or less. As a test, I would suggest looking at the netbootxyz option at github to see if you still get the same error with that loader.
 
generalproxuser said:
Interesting. I am able to pxe boot the proxmox installer with a vm (and real hardware) that runs 16GB ram or less. As a test, I would suggest looking at the netbootxyz option at github to see if you still get the same error with that loader.
Click to expand...
I'll give that a shot. Anything beats spinning my wheels.

One suggestion I saw was to reset the BIOS to defaults and try again, but there's no C.A.M. on this machine. I also saw where VT-d could effect and should be turned off (tried it), but that didn't work.

I'm reluctant to reset the BIOS/UEFI to defaults, and for good reason. I do have three other servers that are exactly the same, and with BMC access so I could copy settings from one to the other if worse came to worst.
 
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