Just a heads up - apparently the more recent Dell RAID controllers will no 
longer recognise hard discs that weren't sold through Dell.
http://www.channelregister.co.uk/2010/02/10/dell_perc_11th_gen_qualified_hdds_only/
As one of the comments points out, that kind of makes them no longer SATA 
or SAS compatible, and they shouldn't be allowed to use those acronyms any 
more.
Matthew
-- 
 An optimist sees the glass as half full, a pessimist as half empty,
 and an engineer as having redundant storage capacity.