Rudi Ahlers wrote: > This raises an interesting question. What do you do in this kind of > scenario? How do you upgrade a NAS / SAN with say 5 / 10 TB worth of data? Lots of the more modern enterprise arrays support online upgrades. Some of them even support re-distributing data across the new spindles to maximize performance/limit hot spots. I personally wouldn't want to purchase any storage array that will have important data on it that doesn't have these abilities. My favorite storage company - 3par has some of the more advanced online optimizations, sample - http://www.3par.com/documents/3PAR-do-ds-08.0.pdf Grow data online, convert between RAID levels online, migrate data between spindle types(FC<->SATA) online etc. Create a volume, and you never have to worry about answering the question 'is it really optimal?' because you can change it at any time without application impact or downtime. nate