ReadyNAS Duo v1 OS Reinstall questions

 From my previous post:

I have purchased another seagate 2tb drive and was able to install the os the drive from disc 1 slot. So I have eliminated that the controller for the Duo has gone bad.

I have one of the old discs in currently and it tells me that there is a Corrupt Root. 

I did some searching and found that I might be able to fix this with an OS Reinstall.

I shutdown the Duo, held in the reset button, pressed the power button, released the power button, waitied for both disc LEDs to flash 1 time, released the reset button.

Now all 5 LEDS are flashing at me in this pattern: 3 slow blinks, followed by 3 rapid blinks. This is power, disc 1 and 2, activity and the led over the backup button.

Is the OS being reinstalled? How can I tell if the OS is being installed? How long does that usually take? The Duo has been like this for 20 minutes now. I will leave it for another 40 minutes. 

UPDATE: the power button is not blinking in the same pattern anymore it is simply blinking. The other 4 green LEDS are still blinking in 3 slow blinks 3 rapid blinks.

Thank you