PERC3/Di replacement

[Per Steinar Iversen]

I got a Dell 2650 (running RedHat AS3) where the PERC3/Di locks up
regularly, mostly during backup at night.

As far as I can discover the problem with PERC3/Di lockups is well known
but no solution is in sight. The question then becomes: What other Dell
RAID controller is OK a replacement?

It seems that the 2650 is sold with a number of different RAID controllers:

PERC 3/Di
PERC 4/DC 
PERC 3/QC

Does anyone know if the PERC 4/DC or the PERC 3/QC have the same problems 
as the PERC 3/Di?

Another alternative is software RAID perhaps.

-psi