You may be looking just a bit harder. If you didn’t purchase the Dell MD3000i and hard drives from Dell directly there are a couple of hard drives that are not able to be used in the Dell Power vault MD3000i.
Fujitsu SATA drives and all Maxtor drives are unsupported drives for that machine.
It seems Dell is moving more towards specific firmware for their drives (similar to HP). So in the event you purchase a newer Dell Powervault storage array or Dell Poweredge server make sure if you did not purchase the drives from Dell to check out the drivers and downloads section at Dell.com for the latest disk firmware.