On Wed, 12 Jul 2006 at 2:31pm, Seth Bardash wrote
Using the 3ware 9550 or 9500 series controllers for any array larger than 2 TB requires that you set up the controller to use "Auto-Carving", set up and build the kernel to enable multiple LUNs, rebuild initrd, reboot, and fdisk / mkfs the unused areas.
This forces the controller to "Auto-Carve" multiple 2 TB devices on different LUNS of the same SCSI ID. You also need to enable multiple LUN support in the kernel when you build a new kernel - which is required.
This is absolutely *not* required. RHEL4 (and thus CentOS-4) explicitly support devices and filesystems up to 8TiB. As I mentioned before, however, one must use gpt disklabels on any device larger than 2TiB. And this precludes one from booting from such a large device, as neither grub nor lilo understand gpt disk labels.