Posts in category "troubleshooting"

I renamed /usr to /usr-root as root. On a live system. Here's the recovery — and what the mistake teaches about operational discipline.

Adding a nightly reboot schedule to RAM-constrained Dell Wyse 3040 Proxmox nodes using SystemD timers instead of crontab.

How to completely remove a broken Ceph cluster from Proxmox — every service, package, config file, and orphaned mount point — so you can start fresh.

An extended power outage plus a remote kernel upgrade left half the cluster unbootable, video outputs dead, and Ceph unstable — a crash cart recovery story with four overlapping root causes.

Fixing a severely imbalanced Ceph cluster where OSDs added in batches left the first three drives at 75-85% while newer ones sat nearly empty — by tuning backfill and recovery parallelism.