Nightly replication had been failing since Aug 17 behind a misleading
incus error; root cause is a JMicron USB bridge dropping off the bus
(61 disconnects in 30 days) and suspending the pool — the disk itself
is SMART-clean. Records the recovery (clear/scrub), the damage, the
ordered fixes, and why nothing alerted: zed was running without an MTA
on the host.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
