Yea wasn't sure if the PERC 6 supported it. I have a Dell SAS 5 Adapter which Will Read my 4TB just fine but if i take my 4TB Raid 0 of my 2TB on the same card and try to clone it it says not enough space. Have to plug it into my motherboards SATA then Clone it.
And yes for the rebuild time. a Rebuild on a Raid 5 with a 4TB drive will take forever. If they are reliable drives then your ok. They just don't reccomend it because if another drive fails in the middle of the rebuild your screwed.
And As Stig said I would go with a RAID 10 as well. We upgraded a client a while back on his server. First it was 3 1TB SAS drives in Raid 5. Performance was shit. Like 50MB read and write. Got him another 1Tb Made a Raid 10 and BAM Was getting like 300 read and write on that stucker! Much less over head on a Raid 1/0/10/01 than a Raid 5, 50,6, 60
Yea when you check newegg they don't really say what the max supported hard drive size is. Kinda lame. Might be able to look into an actual LSI firmware for the PERC card and not the stock DELL Firmware. Was going to do that with my SAS 5 card but there are two version and the one i had wasn't supported by the LSI firmware. Wanted to get RAID 10 but stuck with 1 and 0 for now.
But look around. Might have to go to the actual manufactor webpage to get the real specs, But i'm a fan of LSI when it comes to Raid Cards. Just my opinion though.