Technical
Windows Server 2025 CPU suddenly at 100%: fix the VirtIO and power settings on Proxmox
Windows Server 2025 CPU pegged at 100%? It's usually VirtIO drivers or the power profile. Here's the fix that worked on Proxmox.
Technical
Corrupted Data on a raidz1 Pool: 3 Healthy Disks, 1 Faulted — Here’s the Fix
Corrupted data on a raidz1 pool with all disks healthy? Check the scrub output, then try a zpool clear and a targeted resilver before you rebuild.
Technical
Proxmox VirtIO RNG: /dev/urandom vs /dev/hwrng — use urandom, ignore the hardware
Proxmox VirtIO RNG: /dev/urandom vs /dev/hwrng? Use /dev/urandom as the entropy source. /dev/hwrng is slower, hangs VMs, and adds nothing.
Technical
Proxmox LVM-thin over iSCSI without a native storage plugin
Proxmox has no native LVM-thin over iSCSI plugin, but you can set it up manually with a TrueNAS target. Here are the exact commands.
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
ssl certificate lifecycle management in cPanel when the deploy hook never runs
ssl certificate lifecycle management breaks silently when a cPanel domain lacks the cpanel_uapi deploy hook: the cert renews on disk forever, the server keeps
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.