How to replace failing Disk 1?

Scaevola wrote:

NV+ supports hot swap. Boot the array and either force a rsync view the front view or just yank #1 (paper click in earlier models is necessary) and screw in a new drive and push it home. The sync should happen automatically... The critical thing is to not do anything major with the machine until the swap is completed. If any of the other 3 drives fail, you will loose data. I recall reading a study by google 2% chance for a double failure in raid array (2 failling at once) but I feel like it jumps to 9 if you let the array continue to run on just 3.

Just to clarify, there are only 2 hard drives in the unit. It was set up in a Raid 1 configuration. That wasn't my doing. The person that set it up decided not use the X-Raid. So will that complicate things? Since its Disk 1 that is going bad, will I be able to hot pull Disk 1 out and just put the new drive in or will I have to power down first. And will the Readynas boot back up with a now blank Disk 1? My thinking is that the Disk 1 bay is where the boot drive has to reside and Disk 2 is the mirror so I thought Disk 1 had to contain the boot files and setting in order to boot the Readynas which is why I thought I had to move Disk 2 into the Disk 1 bay and put the new empty hard drive into the the Disk 2 bay, boot it up and then the unit will sync with the now blank Disk 2. Am I wrong?

Thanks,
Adam