I'm preparing a Dell R520 PowerEdge server with 8x 1TB disks as a data archive/warehouse (file, RDBMS, NoSQL) server. Out of the box, the PERC H710P RAID controller was configured with 3x 2TB RAID6 virtual disks. My understanding is that the 2TB limit is something to do with Windows "basic disks" (http://technet.microsoft.com/en-us/library/cc773268.aspx).
I'll be installing either Debian 7.4 or Ubuntu 12.04 LTS as the OS. For simplicity's sake I would like to create a ~5TB partition for data storage.
Is it advisable to create an LVM partition of that size that spans the three virtual disks? Does that lessen the effective 2-disk tolerance that I get from RAID6? Or are there performance issues when spanning LVM over multiple disks like that?
Or, would it be better to delete and recreate the virtual disks as one large 6TB RAID6 virtual disk? Is Debian or Ubuntu also limited to 2TB? I believe that used to be the case. Is it still?