RAID Capacity Expansion solutions?

Question

I'm interested in a Infrant/Netgear X-RAID NAS

Is there another hardware or software solution where I

1. Can add drives to the array
2. Can keep the data on the original array

Edit:

looks like its called Online RAID Capacity Expansion and Online RAID Level Migration

Some devices that support it are QNAP,Thecus,this RAID Controller

I'm favoring a RAID Controller approach to reduce costs

Edit:

Linux supports Software RAID Growing which does the same thing, I think thats a cost effective solution

Answer 1

I have an Infrant ReadyNas NV+ for nearly 2 years and it works great. An alternative to Infrant would be a Drobo + DroboShare - http://www.drobo.com

Answer 2

There is the Drobo but it is hobbled by the slow interface. I have a ReadyNAS NV that I have added drives to over the years and it's been nothing but rock solid for me. So chart up another vote for ReadyNAS.