Thanks Flash, I understand that all of the drives (all 3) would have to be replaced with the large drives - if in fact that larger drive would work.  I see that Dell does sell a 600 GB 15K SCSI however If it does not work with the controller then it would be a waste. Looks like my option might have to be a new server. Thanks again.
Hello, Looking for a little advise - I have a PowerEdge 2600 that has a non-OS RAID-5 array that I would like to expand to the max.  Right now I have 3 279GB SCSI 15k drives and am out of space.  It has a PERC 4/Di controller.   My question is what would be the largest SCSI drives that I could use? Thank you for your help.
RAID expansion