I've got a Promise vTrak m210p subsystem. It supports LUN mapping & masking, and has two SCSI channels (2 VHDCI ins & 2 outs on rear of device). I believe this question will probably apply to many devices of this type.
According to the literature: "With support for up to 256 Logical Drives (LUNs) per array and 32 LUNs per physical drive, the M210p delivers a robust, flexible platform for storage and server consolidation and advanced costs savings. By sharing storage resources among multiple servers, users can take advantage of high availability configurations and employ resource sharing for cost effective storage solutions that maximize capacity utilization."
So my question is this: how can I share this device between multiple servers (directly)? My gut tells me that I could connect one server per channel, so two servers.
Edit: I'm not looking to cluster. Instead I want multiple servers to access their own logical devices.