When installing Windows to a drive greater than 2.2TB you receive Error 0x80042468. This will occur if you install Windows 7 and manually try to create one partition using “Advanced Drive Options” during setup.
This is by design with Windows 7 x86 and with Windows 7 x64 on a non-UEFI system. Note: The check for UEFI and GPT is not done during Setup in Advanced Format like it is done in Disk Management.
Install will complete but you will not be able to access the drive beyond 2.2TB. If you install Windows 7 x64 on a system that supports UEFI you can partition the drive to use GUID Partition Table (GPT) and access all of the drive if the system is in UEFI mode.
Important: The disk that you select must not contain any data. Back up the data, or move your data to another volume before performing operations in diskpart.
In order to Boot a UEFI enabled system the disk type should be changed to GPT using convert gpt command. Follow steps as below.
1. Press Shift+F10, this brings a command window. At command prompt, run the Diskpart.exe (This starts the diskpart console. After the console is initialized, DISKPART> is displayed. The diskpart console is now ready for input commands.)
2. Under diskpart> prompt type “list disk”. (Locate the disk, in this case disk 0) 3. Type "Select disk 0" (This selects the disk that you want to convert to GPT.) 4. Type "Convert GPT" (This command will convert drive to GPT.)
5. Just to make sure everything went fine type “list disk”. The converted disk should now have a asterix in the GPT column. (See example image below)
6. Type exit and exit again. This should close the command window.
Select the disk you have just converted and that should display as “Unallocated Space”. The installation process should start and proceed as usual. After reboot the Windows 7 x64 should be installed on the GPT partitioned disk.
Windows does not support booting of GPT initialized volumes with UEFI systems on 32-bit versions of Windows, and that legacy BIOS systems do not support booting of GPT partitioned volumes. Consult with your system vendor to determine if the system supports UEFI and booting of devices greater than 2TB.
For details on Windows support for large drives see Knowledge Base article: 2581408 Windows’ Support for Disks with Capacity Greater than 2TB
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