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.
Found the answer, they lights should not blink, the activity light on the bottom of the Drobo does ( Sorry for the post ) Lol…