No Activity Light on data transfer

Just got my Drobo 5D today and added 5 new Seagate 2T drives, all went good Drobo mounted via USB with no issues. On the format and 2 hard drive failure setup activity lights where blinking, now all the light are doing is steady green.

The data transfer speed is only 78MB sustained on a 1.4 TB backup file. The lights should be blinking indicating that the drives are doing something? I know data is being written too because I can see usage dropping and in Windows 7 explorer I can see files are getting to the drive.

Thank you for your help.
-Fred[hr]
Found the answer, they lights should not blink, the activity light on the bottom of the Drobo does ( Sorry for the post ) Lol…
-Fred