replacing a failed RAID component

[Steven Bellovin <smb%cs.columbia.edu@localhost>]

I'm using RAIDFRAME in a RAID 1 configuration.  One of the disks has  
failed and needs to be replaced; the question is how, precisely, I do  
it.  More specifically, how do I prepare the new disk?  My assumption  
is that I have to set up the proper fdisk label (including the boot  
block); I then have to use disklabel to make the 'e' partition of type  
RAID.  The last thing I should do is use 'raidctl -R' to reconstruct  
the RAID set.

Do I need to do anything else?  Do I need to do something to  
initialize the replacement disk's RAID stuff?

                --Steve Bellovin, http://www.cs.columbia.edu/~smb