Select partition 1 on disk 1, then delete it - you must use the override command to delete the Microsoft Reserved (MSR) partition. Correct this before you continue, or data loss may occur. If you show more than one partition at this point, you have either selected the wrong drive, or you did not start with a raw drive. In this example, disk 1 is used for the mirror (shadow) drive. Select the disk that you want to be the shadow drive, and then convert the drive to GPT. After it is initialized, DISKPART> is displayed. If you already converted the spare drive to dynamic, revert it back to basic before you follow these steps.Īt a command prompt, run the Diskpart.exe utility.
DISKPART CREATE BOOT PARTITION WINDOWS 7 FREE
You cannot use the Disk Management console to create or mirror EFI or MSR partitions.īefore you start, make sure that you have another BASIC disk with all unallocated free space of equal or greater capacity than the primary disks system and boot partitions. You can use only the Diskpart.exe utility to create the required EFI and MSR partitions. This step creates and prepares new EFI and Microsoft Reserved (MSR) partitions on the shadow drive.
If the primary system drive (disk-0) fails, you can use the EFI partition on the shadow drive (disk-1) to boot. The EFI partition contains the system files used to boot the operating system.
Prepare the shadow drive for mirroringīefore you set up boot volume mirroring, it is a good idea have another GPT disk in the computer that contains an Extensible Firmware Interface (EFI) partition. Disk 0 is the primary system and boot drive. The steps show the expected results returned from each command. The steps are performed with real examples. For help with any Diskpart.exe commands, start Diskmgmt.msc, and then open the help topics on the Help menu. You can do some of these steps with the Disk Management console, but others you can do only with the built-in Diskpart.exe utility.įor consistency and ease of use, this article uses the Diskpart.exe utility to perform the steps. You must have the built-in Diskpart.exe and Bootcfg.exe utilities to create bootable mirror volumes on GPT disks. The disk must have an EFI partition to boot.
DISKPART CREATE BOOT PARTITION WINDOWS 7 HOW TO
This article also describes how to recover after a primary disk failure if the shadow disk did not already have an EFI partition established. Unlike Master Boot Record (MBR) mirrors in 32-bit Windows, there are more steps to successfully create and boot to mirrored boot volumes on GPT disks. This article describes how to successfully set up dynamic boot partition mirroring on GUID Partition Table (GPT) disks.Īpplies to: Windows Server 2012 R2 Original KB number: 814070 Summary
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