replication_mgr "partial transfer due to error"

[Gr-R]

with IO errors, check connection(latency) as well as raid for issues.

[rmoulton]

Okay, but how/where/what to check exactly? And is the lack of recent entries in the source system rsync.log expected?

[Gr-R]

Check destination RAID for any issues. Also verify connection between units is stable.
If the destination fails to accept the data, nothing would be logged at the source.