Technical
Proxmox VE ZFS Benchmark with NVMe: What Actually Matters
Proxmox VE ZFS benchmark with NVMe drives: a practical workflow that tests ashift, recordsize, and sync side-by-side on real hardware.
Technical
Impossible to boot any VMs or container after Clonezilla backup, from original drive
Clonezilla changes disk UUIDs, breaking Proxmox storage references. Here's the fix: update /etc/pve/storage.cfg and VM configs to match the new UUIDs.
Technical
Why rsync –sparse Produces Bigger qcow2 Files Than the Source
rsync --sparse doesn't understand qcow2's internal sparse blocks, so it writes zeros as real data.
Technical
Clustered iSCSI as LVM on LVM-Thin SAN: Proxmox Setup with TrueNAS
Clustered iSCSI as LVM on LVM-thin SAN works if you skip the cluster filesystem and use LVM on top. Here's the setup with TrueNAS and the gotchas.
Technical
Freezing Linux VMs and sporadically connection issues regarding a node: diagnose from IOMMU to ZFS ARC
Freezing Linux VMs and sporadic node connection issues usually come down to IOMMU grouping, ZFS ARC pressure, or a flaky NIC driver.
Technical
Marking clocksource ‘tsc’ as unstable because the skew is too large: fix Proxmox snapshot stutter
Snapshots can make Proxmox VMs drop the TSC clocksource with that skew error. Here's the fix: switch to a paravirtual clock or pin the TSC.
Technical
Proxmox container no internet: diagnose from host to CT
Proxmox container no internet? Work from the host outward: check the bridge, then the CT's network config, then DNS.
Technical
mkdir /mnt/vzsnap0 permission denied proxmox: it’s not /mnt, it’s your storage
Getting 'mkdir /mnt/vzsnap0: Permission denied' on Proxmox container backups? The problem isn't /mnt permissions—it's your storage not supporting
Technical
Proxmox Cluster NFS: Frontend Connects, Backend Fails
The PVE cluster can connect to NFS via the dashboard on the frontend but fails from the backend? It's a routing issue. Here's the interface fix.
Technical
EDID has corrupt header: Proxmox kernel warning explained and how to silence it
EDID has corrupt header on Proxmox is usually harmless, but the log spam is annoying. Here's the kernel parameter to suppress it and when to worry.