Thanks for your message and excuse me for the possible issue, this sounds really shocking.
I can confirm that generally such should never happen. No other user reported similar, even with different type of RDX devices (just checked the tests and reports received from users in the years about HP, TANDBERG, DELL RDX devices with USB and SATA connection where applicable and with devices in the range of 320 GB - 1 TB).
The issue you wrote also sounds weird. I can confirm that Hard Disk Sentinel (during both the normal periodic status detection and when the Surface test window opened but before starting any test) does not access the disk surface (data sectors), especially does not attempt to write (or clear / alter) any kind of data on the devices.
> HDS will not show any informations about the RDX media.
Yes, I'm afraid this is known - and somehow normal. But not really related to Hard Disk Sentinel, this is a limitation of the device itself.
Personally I expected that (as for example with LTO devices, industrial memory cards in addition to hard disks / SSDs) status informtion can be detected with at least some RDX devices. So Hard Disk Sentinel now attempts to detect the status - but according all tests (and reports from users) yes, this always fail, the RDX devices provide absolutely no status information. Which is (in my opinion) a big disadvantage, as considering the value of these devices (and value of data may be stored) we'd need to have complete status information to confirm that the data is safe.
So Hard Disk Sentinel attempts to detect status information (just like for other devices like hard disks, SSDs, etc.) but this detection should be safe enough to do not cause such problems or compatibility issues. This is especially true when SATA connection used: there Hard Disk Sentinel does not attempt any special detection (which may used for USB devices), just detects the device model, its features - and as usually these devices do not support self-monitoring function, it does not perform any further access to RDX devices/media.
Would be nice to investigate the situation, examine what happened exactly - to determine all possible ways about how to avoid it. Maybe related to some combination of OS, RDX device, controller, driver, motherboard chipset, Hard Disk Sentinel version and so.
So please use Report menu -> Send test report to developer option when the appropriate device connected. The best would be if it's possible to send different reports when different connections used.
Sorry for the troubles, I'd do the best to examine, investigate and improve the situation to prevent issues.