Ok, thought I had addressed that above... but your post forced me to go back and do the math:

root@server:/server# fdisk -l 2>/dev/null | egrep "sd[hijk]" | grep Disk Disk /dev/sdh: 2000.4 GB, 2000398934016 bytes

2000398934016 bytes = 1.81935224 TiB

1.81935224 TiB *3 = 5.45TiB

So, it is actually the drive size, but the drive is reporting itself at 2000.4GB when it is not and OSX reports it as 2TB when it is not.

Ok, thought I had addressed that above... but your post forced me to go back and do the math:

root@server:/server# fdisk -l 2>/dev/null | egrep "sd[hijk]" | grep Disk 
Disk /dev/sdh: 2000.4 GB, 2000398934016 bytes


2000398934016 bytes = 1.81935224 TiB

1.81935224 TiB *3 = 5.45TiB

So, it is actually the drive size, but the drive is reporting itself at 2000.4GB when it is not and OSX reports it as 2TB when it is not.