SCST is pretty sweet. I'm on the SCST mailing list, and there are new features all the time, with excellent performance on the basic iSCSI stuff.


A nice thing about SCST is that it supports exporting devices using:

iSCSI, of course

Fibre Channel (even support for 8Gbps)

SCSI RDMA Protocol (SRP), a very low latency iSCSI-like connection using Infiniband (which has 40Gbps over a single connection), which is an inexpensive interconnect that almost all the fastest supercomputers use

Fibre Channel over Ethernet (FCoE)

Parallel SCSI (!)

SAS (even the new 6Gbps cards)



Also, you can use file-io, block-io, or even just pass-through (for sharing old Magneto-Optical or Tape systems over your network of choice).

Open-E doesn't support all of these interfaces, yet, but if enough people would use a given feature, I'm sure they'll get around to implementing it.