I have a server that has been running fine for many years. 5700G on an MSI B450 motherboard. 6 HDDs and a WD Black SSD.

I have tried installing a 5060 ti today. To get the system to boot I had to downgrade from PCIe 3 to 2. If I go back, the system boot loops.

When I get into unraid, all of my HDDs appear in their correct spots (mix of parity and main array). For my cache, it shows my SSD as a new disk with the blue logo though.

I am worried that if I attempt to boot with this, it will wipe my cache drive. Nothing should have changed in terms of the SSD, it's in the same slot, it's not shared with the PCIe slot the GPU has gone into, but I think downgrading the PCIe version has changed something and unraid is seeing it as a new drive. Looking in my diagnostics export, the smart/* file entries for the old and new are identical.

What's my best route here? I want to update the firmware on the GPU so I can enable v3 again, but to do that I need to start the array. Am I better off using a windows USB to update the firmware and then go back to unraid, or can I start the array in this state?

Diagnostics attached and any help massively appreciated.

tower-diagnostics-20260310-1557.zip

If there's no red warning about data deletion, it should be OK, but just in case, do this:

on main click on the first device for that pool and then "remove pool"

back on main, create a new pool with the same name and number of slots

assign the pool device(s), leave the filesystem set to auto

start the array to import the pool

Thank you. In the end I backed up the drive and just started the array and it was... fine. No formatting or anything required. Will chalk it up to a bug in unraid's UI.