I'm just doing some testing on a NAS RAID array we've been lent to see if we want to deploy it. Just to see whats what, I decided to see what kind of network performance we get when it's re-building a RAID-5 array.
I'm noticing that network connectivity has dropped to about 7MB/s, which is about 60Mbps. A long way shy of the 1Gb connection it has to the network. When it's not re-building it's closer to 70Mb/s (with Jumbo Frames).
Would you expect this kind of a massive drop-off when re-building? At the moment it has three 750Gb 7200RPM SATA drives installed.