I just bought a new iMac, and want to buy a NAS backup solution (connect my iMac and a MacBook to a Giga subnet) (thinking about the Lacie 5big Network 2).
However I was told that backing up to a NAS will cause issues with naming (as Max OS allows names not allowed by windows). Who can shed some light on this?
How could that cause an issue? You're talking about backing up to a drive that's only going to be used for Macs, right? It does have to be formatted as HFS+ if you're going to use Time Machine, and only a few NAS systems are officially supported, but it will certainly work.
If the filesystem on the NAS isn't HFS+, then Time Machine will create a "Sparse Disk Image Bundle" (.sparsebundle) which isHFS+... and backup to that mounted volume instead. That's how Time Capsule itself works.
Correction: i believe that Time Machine actually creates a "HFSXJ" filesystem, aka Mac OS Extended (Case-sensitive, Journaled)