Thanks for the information.
I am aware of recovery mode and I have tried it as well, but I suppose during testing I got confused by the descriptions of 'continuous' and 'on request' modes.
What I want to achieve is a fully automatic resync of the drives upon inserting the new drive (a fresh drive or the recovery drive in case of recovery mode). This is necessary as the device has no user interface available.
From my testing even continuous mode required a manual triggering of updating the recovery drive with the data from the master drive upon insertion. Again, all configuration was done from the OS tray app. Is continuous mode supposed to always force the data from the master to be copied to the recovery volume or a new drive without the need to reconfigure the array?
Would inserting a fresh drive guarantee a correct resync in RAID1 mode?