RAID 1 Hardrive failure question

One of our PowerEdge 1950s appears to have a bad drive.  The display is reading E1810 HD 0 Fault and the drive in question has an amber light blinking rapidly.  The drives are SAS.

 

These are configured in RAID 1 and the server is still operating normally.  I have not had a chance to troubleshoot this yet as I cannot take the server down at this time.  When I have the chance I will try reseating and rebuilding, running diag., etc.  Anything particular I should try?

 

If after troubleshooting the drive does turn out to be bad, what is the procedure for replacing with a new drive?  Put new drive in and rebuid? Just want to be sure I don't wipe the array.

 

Also, one last thing are these drives hot swappable?

 

Thanks