Yeah, HighPoint uses higher end Marvell chipsets, IIRC. These generally require the "unsafeDirectIo" option to be turned on to be able to see the SMART data.
And as for the SMART data, the disk must be passed through to the system directly. HighPoint's management software calls these disks "legacy" disks.
And no, StableBit Scanner won't be able to see the SMART data from a RAID array or a JBOD array (not sure which you used), as that information is not passed on by the controller.
However, you can view the individual disks' SMART data by using the web management software for the controller.
As for StableBit DrivePool and how it works, it stores files on normal NTFS partitions, in a hidden folder named "PoolPart.xxxx" (where the "xxxx" is a string of letters and numbers called a "GUID").
Then when you view the contents of the pool, it lists the corresponding locations on the pooled disks. And when you access files, it basically redirects the IO operations to the pooled disks instead.
It's a file based system, where as RAID is a block based system. The main difference is when it comes to recovery. A DrivePool disk, you can recover with any utility that can read NTFS. For a RAID.... it depends on what type of array you created. And what tool you're using.
And the Pool is like a RAID 10 array. It's "striped" or can span many disks. However, you can enable file duplication (aka file mirroring) on a per folder basis. But one that you can move to any system, regardless of the disk controller(s) in use (the same cannot be said of RAID, actually).
However, the thing is, since StableBit DrivePool is using the normal disks, you will not see some of the incredible speeds that you would with a RAID array (especially with a higher end system). Though, we do have a few options to help with that. The first being "Read Striping" which basically does what it sounds. Except that it is definitely more complicated than that. The other is the "SSD Optimizer" balancer (it's optional, so you must download and install it yourself). This uses "feeder" disks for writing to the pool, and then migrates the data off of the "feeder" disks.
If you want, there is a fully featured, 30 day trial for both products. If you don't like StableBit DrivePool, you can empty out the files via the "PoolPart" folders if you want.