Monitoring & Maintenance

# All ports should report "Online"
cat /sys/class/fc_host/host*/port_state

# Check for link errors
cat /sys/class/fc_host/host*/link_failure_count
cat /sys/class/fc_host/host*/loss_of_sync_count
cat /sys/class/fc_host/host*/loss_of_signal_count

# Speed verification
cat /sys/class/fc_host/host*/speed

# Current multipath status
sudo multipath -ll

# Watch for path changes
sudo multipathd -k"show paths"
sudo multipathd -k"show maps"

# Multipath daemon logs
sudo journalctl -u multipathd -f

# Verify all expected paths are present
sudo multipath -ll | grep -E "^(mpatha|[0-9]+:[0-9]+:[0-9]+:[0-9]+)"

# Check for failed paths
sudo multipath -ll | grep -v "active ready"

# Reload multipath configuration without service restart
sudo multipathd reconfigure