- You configure the master boot record (MBR) disk as the boot partition.
When the MBR disk is used as the boot partition or as the data partition, 2 TB is set as the size limit for the MBR disk. For more information about the size limit for the MBR disk, visit the following Microsoft Web site:
- You configure the GUID partition table (GPT) disk as the boot partition.
When you start an operating system from a GPT disk, the Extended Firmware Interface (EFI)-based BIOS is required. However, the EFI-based BIOS is not supported in Windows Vista 32-bit editions. Additionally, it is not supported in Windows Vista 64-bit editions unless you install Windows Vista Service Pack 1 (SP1).
Note There is no 2-TB limit if the GPT disk is used in a data partition.
Windows Vista 32-bit editionsTo work around this issue, set the size of the system partition to less than 2 TB, and then reinstall Windows Vista.
Windows Vista 64-bit editionsTo work around this issue, use the GPT disk as the boot partition, and then install Windows Vista SP1.
For more information about how to obtain the latest Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:
Article ID: 946557 - Last Review: Jul 8, 2009 - Revision: 1