opinion on which software RAID to use

[Vivek Khera]

I have a stack of new boxes here with two SATA drives on which I plan  
to do software RAID.  The box actually has a hardware RAID but it is  
somehow disabled since I didn't pay extra for it... I can access the  
BIOS and set up the RAID volume but it fails at boot.  So they are  
configured as individual disks.  The boxes are Dell PowerEdge 1425SC.

Anyhow, I see at least three ways to set up a mirror of these drives  
and/or partitions:

  gvinum
  gmirror
  atacontrol

Any opinions on which has both qualities: easy to configure/manage  
(ie, recover after failure) and performance?  The handbook RAID page  
doesn't even mention gmirror.  The atacontrol seems very simple to  
use, at least.

Let me know what you think.  Thanks!