I currently have a HP NAS 1500S (32-bit hardware) which originally came with less than 640 GB worth of raw disk space (4 SATA HDD's) and Windows Storage Server 2003 (32-bit). My boss is telling me that I can upgrade the OS to Windows 2008 (32-bit), replace the SATA controller with an Adaptec SATA II 2420SA (4 SATA connectors) and use 4 2TB Seagate Barracuda HDD's. He keeps insisting that I can use RAID 5 on all the drive to do this. I am running into some issues:
1. I cannot create 1 logical RAID 5 disk and boot from it in Windows 2008 because of the MBR limitation of 2 TB.
2. I can create one 2 TB boot logical disk and use the other 3 disks in a raid 5 using GPT partitioning, but that leaves the boot partition vulnerable and not redundant.
3. I can create two (2) RAID 1 logical disks, but that defeats the purpose of investing in such large hard drives.
Am I wrong in thinking that this cannot be done on this hardware alone? Do I need to use Itanium hardware and/or EFI to boot from such a large RAID 5 logical disk (which this hardware does not have)? Are there any SATA controllers that help with this type of configuration?
Thanks for your help in advance.