Kent,
I have just recently installed RAID-5 on my 2.2.10 w/ MOSIX machine. I
did a similar test and really all you have to do in case of that kind of
failure is (assuming you unplugged sdd):
1.) Shutdown the machine
2.) Replace (or re-plug-in the drive) the failed drive w
Software levels: Redhat 6.0, kernel 2.2.5-15, raidtools-0.90
I recently set up raid-1 on my system to do disk mirroring.
The mirroring is working just fine. I decided it would be wise to test what
would happen if I lost one of the two disks that are in this raid test, so I
simply unplugged one