I'm running a clone of 1 ReadyNas with 4 x 400GB drives to another on the same local gigabit network. It seems to be taking a lot longer than I would expect - the job has been running for 48 hours now and is well under half complete?
Stats are that in 48 hours, it has backed up 29,062 files and 361GB - which works out at an average transfer rate of 2Mbytes per second, which seems rather slow given the servers aren't currently loaded with much other activity.
Any ideas as to what I should expect for a Nas -> Nas local copy?
Running IO meter on the drives (while the backup is running) gives the following:
Nas1 (source): Read average 17MB/s Write 9MB/s
Nas2 (dest): Read Average 14MB/s Write 7MB/s
So it kind of looks as if there is plenty of unused write capacity even while the backup is running. The drives are configured Raid-5.
Are my expectations just too high?