Ok, so my memory was a bit off on the warnings you get with single-path drives. I found an old 320GB 5400rpm laptop drive, put it into the sled of a dead 36GB 15K dual-port SAS drive, and plugged it into a spare slot in a D2700 expansion shelf connected to a P2000G3 10GbE iSCSI unit. The array had no problems identifying the drive and would have been happy to create a vdisk with it to present to a host. Took a couple of screenshots from the web management interface - one showing the disk details, the other showing vdisk creation including the warning you get about single-path drives. Single-path disks do get controller failover, just not path failover. Of course that means you can't break the SAS paths one at a time to hot-add expansion shelves to the array if there are any single-path disks in it.So single-port 2.5" SAS drives are OK, but they would only be attached to a single controller so no high availability. HA is, for me anyway, the only reason to go with a SAN box like this over say a ZFS server, but good to know that at least they work in a pinch. Fingers crossed that your test with SATA drives also work - would be good to know.