About the 4k sector drives

Hello, I recently get a Drobo S and four WD disk, now that all is working I discovered that the discs are these news with 4k sectors.
What should I do?
Updating the firmware to lastest and the changind the pins for configuration of the disk and then reinsert it?

You should be able to just pop it out, leave it out for a bit, then reinsert it - causing a rebuild. With the upgraded firmware it should treat the 4k sector drive properly.
Recommend you get Data Robotics to confirm first.

especially since DRI said that the 4k drives dont work properly with the old firmwares - i would NOT want to trigger a rebuild off suspect drives.

phone/e-mail DRI before you do anything would be my advice.