Looking for a solution something like LVM in Linux

[gurple]

Hi,

Like the subject says, I'm looking for an OS X (Server) feature that 
allows me to dynamically span logical volumes across multiple physical 
drives. This isn't a RAID but the logical volumes created by a RAID 
could be used to supplement the volume group's ultimate logical volume. 
Ultimately I'd like to also know if it is possible to use Network Block 
Devices in OS X (S) to further distribute these volumes across multiple 
machines.

The goal here is to provide a solitary volume that isn't dependent upon 
a single point of failure such as a single device for access.

Does this at all sound feasible using OS X

Cheers,
gurple
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