troubleshooting - CapturedByNguyen

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.

NguyenAugust 23, 20262 min read

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.

NguyenAugust 23, 20262 min read

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.

NguyenAugust 22, 20262 min read

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.

NguyenAugust 21, 20262 min read

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.

NguyenAugust 21, 20261 min read

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.

NguyenAugust 20, 20262 min read

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

NguyenAugust 20, 20264 min read