#KVM
VM Sees the Dongle but Has No Internet Without a Windows ECM Driver
After passing a USB LTE dongle through to a Windows VM, the system sees the device but no network adapter appears. The cause is neither the SIM nor port passthrough, but the dongle exposing a CDC ECM interface that Windows has no built-in driver for, along with storage-mode pitfalls and dhclient overwriting the host's resolv.conf.
Borrowing a VLAN for Windows Tools That Need the Same L2
Many manufacturers' device discovery tools use broadcasts that cannot cross L3, so connecting over a VPN still leaves devices invisible. A solution that leaves switch ports alone is to put a small Windows VM on Proxmox with its interface directly in that VLAN, with pitfalls around vlan-aware bridges, a full thin pool breaking other VMs, and virtio leaving Windows without a network adapter after installation.
Using Claude to Upgrade Proxmox 8 to 9 and Rebuild Windows VMs
A real case using VS Code + Claude to upgrade an entire Proxmox cluster from 8 to 9, then delete and rebuild all Windows VMs for VDI without ever SSHing into a host myself. I have laid out the commands and scripts Claude generated during the actual work as steps that a person or AI can read and run again.
qcow2 or ZFS — Why I Switched After 12 Years on the Same Server
The reasons behind my storage choices for a Proxmox server that has run for 12 years without a reinstall — why I chose qcow2 in 2014, why I only moved to ZFS in 2026, and what actually changed the calculus.
DA CentOS 7 → Debian 12 on Proxmox Part 1 — NAT pre-stage
Preparing a new VM on an internal bridge with NAT while the old VM continues serving customers, reducing downtime when migrating DirectAdmin from CentOS 7 to Debian 12 on Proxmox.