Proxmox on microSD cards is technically possible, but terrible transfer speeds aren't the only problem
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Running Proxmox on microSD cards is technically feasible but deeply impractical. Installation took over 40 minutes, LXC containers were sluggish, and VMs with desktop environments were nearly unusable — a NixOS install took over 90 minutes. Beyond the terrible transfer speeds (around 30MB/s sustained write), the real dealbreaker is microSD card write endurance. Even with mitigations like disabling pve-ha services and using Log2Ram to reduce write frequency, microSD cards are far too fragile for a home server workload. The experiment serves as a cautionary tale against using microSD cards for Proxmox nodes.
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My microSD card didn’t take too long to install ProxmoxVirtual machines, however, crawled at a snail’s paceBut the limited endurance of microSD cards is the real deal-breaker in this setup870 Impressions