Network file systems

[Michael Hipp]

Is there a "network file system" that has all the features of a true Linux 
file system (e.g. ext3)? I'm thinking of features like inodes, hard links, 
soft links, unix security model, mtimes and atimes, journalling.

I know samba pretty well and it doesn't do this AFAICT as it basically 
emulates a FAT32 fs over the wire.

Does NFS do this? Is there some other "n. f. s." that does? (I read opinions 
of NFS not being all that stable.)

Can you do RAID over the network?

Thanks,
Michael