On 2018-06-28 10:17 AM, Chris Murphy wrote: > 2. The new data goes in a single chunk; even if the user does a manual > balance (resync) their data isn't replicated. They must know to do a > -dconvert balance to replicate the new data. Again this is a net worse > behavior than mdadm out of the box, putting user data at risk. I'm not sure this is the case. Even though writes failed to the disconnected device, btrfs seemed to keep on going as though it *were*. When the array was re-mounted with both devices, (never mounted as degraded), and scrub was run, scrub took a *long* time fixing errors, at a whopping 3MB/s, and reported having fixed millions of them.
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