When will disk drives have an iSCSI interface?
Probably never. It is very expensive for a disk drive manufacturer to maintain multiple interfaces. Their plan is to let other manufacturers use SCSI and ATA drives to build storage arrays. The push for iSCSI devices is threefold: 1) Disk arrays that have multiple disk drives and maybe RAID hardware. 2) Tape drives that support a direct iSCSI connection. 3) SCSI devices (tape, disk, and other) that are supported through a SCSI-iSCSI gateway box.