High Capacity RAMDrive-like Devices?

UranusHertz asks: "We are trying to build a multiheaded, read-only database and we are looking to see if there is a device that will act as a large RAMdrive. We are currently using RAID arrays and fibre channel SCSI arrays. What we would like is essentially a large (8GB and up), volitile array of RAM to do the same thing that the RAID does now. One head (server) would have control over the device and the other heads would mount it NFS read-only. We are stil not sure if the database will even do this yet, but we are also trying to stay ahead of the game."