On Thu, Jun 18, 2015 at 04:49:06PM +0800, Wen Congyang wrote:
> +== Failure Handling ==
> +There are 6 internal errors when block replication is running:
> +1. I/O error on primary disk
> +2. Forwarding primay write requests failed

s/primay/primary/

> +3. Bacup failed or writing to secondary disk failed

s/Bacup/Backup/

Is "writing to secondary disk failed" a duplicate of #4?

> +4. I/O error on secondary disk