It looks like the system splits up each drive into as many partitions as needed to create a series of RAID5 and/or RAID1 arrays that minimize the amount of unused space on the drives. Those RAID arrays then become physical volumes under LVM, which, in turn, presents all that storage as a single logical volume. … Read more
I had the same problem after updating my Synology NAS to DSM 4.1. I also do rsync over SSH. In my situation using rsync user root@ip also worked but left the files on the server with owner root which I did not want. I found in the NAS admin userinterface, that for some reason in … Read more
For future reference: after way too many hours researching and debugging this issue, I finally discovered the root cause. The OpenSSH version used by Synology is a highly customized version, that does not behave like the original code. It has lots of hacks and ad-hoc customizations – e.g., additional checking before accepting a login to … Read more