> my only concern is will these run no problem on 32bit windows XP?
Probably NOT!
This WD model comes with a Highpoint RocketRAID series 620 PCI-E controller from Highpoint:
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136764&Tpk=N82E16822136764 (see Feedback!)
http://techreport.com/articles.x/19871
"Using 512e is all well and good on drives with capacities less than 2.19TB, but you run into problems with anything larger because Master Boot Record partition tables can only address up to 2^32 blocks. With 512-byte sectors, that adds up to a maximum capacity of 2.19TB, or considerably less than the 3TB offered by the new Caviar Green. The storage industry's answer to the MBR's addressing limitation is the GUID Partition Table, or GPT, which can address up to 2^64 sectors. Windows XP doesn't work with GPT partitions, so Western Digital isn't supporting the drive under that OS, although it notes that users may be able to find workarounds using third-party controllers and drivers." [end quote]
p.s. If you want a single partition to exceed 2TB using XP,
take a look at some of Highpoint's RAID controllers that
support VSS (Variable Sector Sizing): this VSS feature
permits a RAID array to be configured with disk sectors
that are larger than 512 bytes. You will NOT be able to
boot XP from such a RAID array, however. Before buying,
I also suggest that you contact Highpoint first, and follow
their guidance. I do believe that other manufacturers
of RAID controllers also support features similar to VSS.
MRFS