With the wider availability of storage devices that are larger than 2 TB, you can create a Windows boot partition that is larger than 2 TB. This poses a risk in the scenario described here, because a maintenance or servicing activity (for example, the installation of a hotfix, defragmentation, or restoration from a backup) can cause a boot-critical file to be moved beyond the 2 TB limit that is imposed by 32-bit LBA. Because the pre-boot environment cannot access this file, Windows will not boot.
- OEMs can provide a fix for this issue through a firmware update, together with either 64-bit LBA support in traditional Option ROM drivers or prioritizing UEFI drivers when traditional Option ROM is loaded. Please contact your OEM to check whether such an updated firmware exists.
- Some UEFI implementations provide a setting to select the drivers to use in this mode. An administrator can select UEFI drivers instead of traditional Option ROM drivers to access storage larger than 2 TB.
- The administrator can also reduce the size of the boot and OS partitions so that the last logical block address for both the boot and OS partitions is located below 2 TB. This configuration prevents boot-critical files from being accidentally relocated to an address above 2 TB, where the boot environment cannot read them.
Artikel-id: 3004880 – senaste granskning 30 okt. 2014 – revision: 1