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W11 (compute6 pve-firewall xtables conflicts): race condition between pve-firewall's iptables_restore (no -w flag) and Docker's iptables backend. Self-resolves within 10-120s; no firewall gap; no action taken. Conflicts align to :58 minute mark = Docker daemon start time at last compute6 boot (Apr 19 12:58). W12 (compute2 corosync-qdevice boot failures): qnetd on PBS (.153); PBS has crash-rebooted 34 times since Apr 21, each correlated with USB ZFS import failure (same as C1, May 5 health check). Each PBS reboot drops qnetd for ~60s; cluster quorum unaffected (6 node votes, threshold 3). No action this phase. Phase 5 items: fix PBS USB ZFS instability; optionally migrate qnetd from PBS to Pi4 (.227). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>