[Day 612 · T-3.247s] orbital-47 final telemetry frame
  buffer origin: read-only candidate
  leader: orbital-47
  failover target: rack-edge-1

[03:14:07.272] battery: cell stack 3 undervoltage (1.581 V; threshold 1.750)
[03:14:07.273] battery: cell stack 3 disconnected by BMS
[03:14:07.281] power: bus 12V drooping (4.7 V load; 5.0 V min)
[03:14:07.288] watchdog: I/O timeout on sd0
[03:14:07.290] kernel BUG at fs/buffer.c:1228
[03:14:07.291] CPU0: stopping

Postmortem:

Immediate cause: kernel BUG.
Upstream cause: I/O timeout.
Original cause: cell stack BMS disconnect.
Cause of the cause: thirteen years of cosmic ray, thermal cycling, and a
cell chemistry no surviving integrator is left to recompute.