As mentioned in the beta release notes, the kernel in RHEL 7.2 contains a rebased LIO kernel target, to the equivalent of the Linux 4.0.stable series.
This is a big update. LIO has improved greatly since 3.10. It has added support for SCSI features that enable VMWare VAAI support, as well as data integrity (DIF), and significant iSER work, for those of you using Infiniband. (SRP is also supported, as well as iSCSI and FCoE, of course.)
Note that we still do not ship support for the Fibre Channel qla2xxx fabric. It still seems to be something storage vendors and integrators want, more than a feature our customers are telling us they want in RHEL.
(On a side note, Infiniband hardware is pretty affordable these days! For all you datacenter hobbyists who have a rack in the garage, I might suggest a cheap previous-gen IB setup and either SRP or iSER as the way to go and still get really high IOPs.)
Users of RHEL 7’s SCSI target should find RHEL 7.2 to be a very nice upgrade. Please try the beta out and report any issues you find of course, but it’s looking really good so far.