Proxmox VE 9 fails

thomasDK

New Member
Oct 15, 2025
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I am in the process of installing proxmox ve 9 on my dell r510 it has run with proxmox before so it shouldn't be a problem.
I had to change the RAID controller as we would rather manage all disks directly in Proxmox, so they are set to run in RAID0 on each disk so there are 7 disks, I have tried with Rufus and balenaEtcher but I get a strange error.
I have tested all the hardware in iDRAC and there are no errors on any of it, not even RAM.
So now I am stuck and have no idea what the next move should be, so I hope someone here with the wise stones.
I have also used intel_iommu=off and have tried a lot of different settings in the BIOS, I start the machine without UFEI but with BIOS instead.

I am desperate now hoping for your help20251015_105815.jpg
 
Have you tried booting the ISO directly via iDRAC?

Also, assuming you boot via a USB flash drive, have you already another flash drive?
Depending on the vendor and usage, they might not be the most reliable.

I'd also recommend checking the SHA256SUM of the downloaded ISO, maybe the file got corrupted during download.

The error you are getting is definitely caused by a corrupt installation image.
 
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Based on the shared logs:
The errors zstd decompression error: 20 and SQUASHFS error: ... data probably corrupt indicate that the Proxmox installer image is either corrupted or not being read correctly. This could be due to a damaged ISO file or a faulty USB installation media.


Recommendation:
Download the ISO again from the official Proxmox website and recreate the USB installer.
If the SQUASHFS errors persist, the issue lies with the installation media (e.g., USB drive or port).
If the DMAR errors continue, disable VT-d (IOMMU) in the BIOS settings and then proceed with the Proxmox VE installation.
 
Have you tried booting the ISO directly via iDRAC?

Also, assuming you boot via a USB flash drive, have you already another flash drive?
Depending on the vendor and usage, they might not be the most reliable.

I'd also recommend checking the SHA256SUM of the downloaded ISO, maybe the file got corrupted during download.

The error you are getting is definitely caused by a corrupt installation image.
I helped ThomasDK to the best of my klnowledge (we know each other privately).
For some reason,I didn't even think of trying iDRAC. I'll tell him to try it in iDRAC.
We did check the checksum, which matches the one on the website.
The ISO has also been re-downloaded.

Based on the shared logs:
The errors zstd decompression error: 20 and SQUASHFS error: ... data probably corrupt indicate that the Proxmox installer image is either corrupted or not being read correctly. This could be due to a damaged ISO file or a faulty USB installation media.


Recommendation:
Download the ISO again from the official Proxmox website and recreate the USB installer.
If the SQUASHFS errors persist, the issue lies with the installation media (e.g., USB drive or port).
If the DMAR errors continue, disable VT-d (IOMMU) in the BIOS settings and then proceed with the Proxmox VE installation.
Since the ISO has been re-downloaded, I think you could be right about the USB drive might be the issue.

We'll try iDRAC and another USB drive and one of us will get back to you with an answer. Thank you so far :)
 
I helped ThomasDK to the best of my klnowledge (we know each other privately).
For some reason,I didn't even think of trying iDRAC. I'll tell him to try it in iDRAC.
We did check the checksum, which matches the one on the website.
The ISO has also been re-downloaded.


Since the ISO has been re-downloaded, I think you could be right about the USB drive might be the issue.

We'll try iDRAC and another USB drive and one of us will get back to you with an answer. Thank you so far :)
You are welcome. :)
 
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Thank you very much for the help, I don't really know what the problem was but I think it could easily be the USB.

I tried to open iDRAC in a browser, but with TLS1.2 and without Java, it all becomes a bit more of a hassle, so I found someone who has made a Docker that opens the port and creates a VNC in a browser, it works great, you just have to remember to change the screen size in the docker file, otherwise you have to run in "DISPLAY_WIDTH=801", "DISPLAY_HEIGHT=621", which is a bit tedious.

So after several days of searching and working with the server that was on the verge of going out the window several times, I have reached my goal, so we can also give the young people a good experience at "Our LanParty", so again thanks for the help.

I'll just throw in the link to the docker I used.
https://hub.docker.com/r/domistyle/idrac6
 
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