CachyOS Wouldn't Install and My NVMe Was the Problem (Corrupted GPT + chwd Fix)
I was setting up CachyOS on a secondary laptop — i7 11th Gen, NVIDIA mobile GPU, Micron 2210 NVMe. Should've been a clean install. It wasn't. Two specific things broke and both of them looked like my fault until they weren't.
Problem 1: The NVMe with an Identity Crisis
The CachyOS installer (Calamares) failed to create a partition table on the Micron 2210 NVMe. No useful error, just a failure. I dropped into the terminal and ran gdisk:
sudo gdisk /dev/nvme0n1
Three warnings. Then this:
MBR: not present
BSD: not present
APM: not present
GPT: damaged
Found invalid MBR and corrupt GPT.
The drive had a corrupted GPT and ghost MBR headers from a previous install. The Calamares installer couldn't write a clean partition table because it was fighting old metadata it couldn't fully read or overwrite.
The fix is a full zap from inside gdisk:
sudo gdisk /dev/nvme0n1
# at the prompt:
x # enter expert mode
z # zap GPT data — confirm with y
# then zap MBR — confirm with y
Drive came out completely clean. Re-ran the installer, partition table created without issue.
If gdisk can't get there, hit it with wipefs first:
sudo wipefs -a /dev/nvme0n1
Intel VMD note: If you're on an 11th Gen Intel laptop, check your BIOS for Intel VMD (Volume Management Device). If it's enabled, Linux can see the NVMe drive but can't write to it properly. Disable VMD or switch from RAID to AHCI/NVMe mode before trying any of the above.
Problem 2: chwd Killed the Install Mid-Way
After getting past the NVMe issue, the installer failed again — this time at chwd, the CachyOS hardware detection tool. The online installer couldn't pull the driver profiles, likely a mirror timeout.
The fix: switch to the offline installer.
It installs a default desktop from the USB without pulling anything from the network. Once booted into the system, run hardware detection manually:
sudo chwd -a
That scans your hardware and applies the right driver profiles — in my case, the Intel + NVIDIA hybrid (Optimus) setup for the laptop.
TIL
Old partition metadata is silent until it isn't. Before installing anything on a drive that's been used before, zap it manually — don't trust the installer to do it cleanly.
