On Wed, 20 Aug 2008 at 5:19pm, Brian Marshall wrote > The controller is 8 channel SATA 300. That's not the problem. The problem is > getting the OS to mount a 4TB array after the initial install of the OS. We > had a 1.5 TB on there for a few years and never had this problem with arrays > under 2 TB. Your original post said 2GB, not TB. Are you trying to boot from this device? Because you can't. Search the list history for multiple posts about dealing with >2TB drives. The highlights are: a) You can't boot from it b) You must use a gpt disklabel c) You must use parted to partition it -- Joshua Baker-LePain QB3 Shared Cluster Sysadmin UCSF