Proxmox

My Proxmox host froze under load three times in one week. The root cause wasn't software — it was a marginal PSU triggering TDP throttling, which exposed a ZFS ARC deadlock. Here's the full chain from symptom to fix.

DISASTER-RECOVERY.md documented the Proxmox Backup Server restore procedure in detail. It had never been executed end-to-end. Running it for the first time - against a scratch VM, alongside the still-running original - found a network conflict the documentation never mentioned.