how to use 5T RAID disk with NetBSD

Hi,

I have a 5 TB RAID array that is connected to a NetBSD host. The NetBSD
host doesn't give me the correct information about the size of the RAID
arrays (0 sec):

*****
sd2 at scsibus1 target 0 lun 0: <IFT, A16U-G2421, 342E> disk fixed sd2:
512, 168126 cyl, 255 head, 0 sec, 512 bytes/sect x 1 sectors
sd2: sync (6.25ns offset 127), 16-bit (320.000MB/s) transfers, tagged
queueing
******

As I understand, NetBSD can handle up to 4TB file system on both 64- and
32-bit machines so I partition my RAID array into 2: 4TB and 1TB. The host
can detect the 1T disk correctly but it still doesn't give correct
information about the 4T disk (0 sec).

*****
sd2 at scsibus1 target 0 lun 0: <IFT, A16U-G2421, 342E> disk fixed sd2:
1212 GB, 39120 cyl, 255 head, 255 sec, 512 bytes/sect x 2543824896 sectors
sd3 at scsibus1 target 0 lun 1: <IFT, A16U-G2421, 342E> disk fixed sd3:
512, 129005 cyl, 255 head, 0 sec, 512 bytes/sect x 1 sectors
sd2: sync (6.25ns offset 127), 16-bit (320.000MB/s) transfers, tagged
queueing
sd3: sync (6.25ns offset 127), 16-bit (320.000MB/s) transfers, tagged
queueing
********

My questions are:
- Can NetBSD 4.0 handle > 4T file system ?
- Do I need to make the kernel detect the harddisk correctly before using
it ? If yes, how could I do that ? Do I need to rebuild the kernel ? If
yes, what option needs to be changed in the GENERIC file ?
 - How can I add the 4T hard disk to the existing NetBSD host? Disklabel
doesn't calculate the size correctly and not allow me to partition the
disk bigger than 2T.
- Is there any tool similar to disklabel that handles the big disks.

Thank you very much,

Co Ngo