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Old 06-30-2015, 09:52 AM   #1
Andrew B.
Join Date: Jan 2005
Location: Los Angeles, California
Posts: 3,966
Default Beyond 2tb with Windows

Now that I have a 2tb external drive (which is not even half full) I began to ponder what I might do if it does become full. Anyway, I found an article by MS that shows how to do it, but at the bottom it says.

Known Issues/Limitations
Because the transition to a single-disk capacity of greater than 2 TB has occurred fairly recently, Microsoft has investigated how Windows supports these large disks. The results reveal several issues that apply to all versions of Windows earlier than and including Windows 7 with Service Pack 1 and Windows Server 2008 R2 with Service Pack 1.

To this point, the following incorrect behavior is known to occur when Windows handles single-disk storage capacity of greater than 2 TB:
The numeric capacity beyond 2 TB overflows. This results in the system being able to address only the capacity beyond 2 TB. For example, on a 3 TB disk, the available capacity may be only 1 TB.
The numeric capacity beyond 2 TB is truncated. This results in no more than 2 TB of addressable space. For example, on a 3 TB disk, the available capacity may be only 2 TB.
The storage device is not detected correctly. In this case, it is not displayed in either the Device Manager or Disk Management windows.
Many storage controller manufacturers offer updated drivers that provide support for storage capacities of more than 2 TB. Contact your storage controller manufacturer or OEM to determine what downloadable support is available for single-disk capacities that are greater than 2 TB.
SCSI sense data
When a disk encounters errors that are related to unreadable or unwriteable sectors, it reports those errors and the relevant SCSI sense data to the operating system. SCSI sense data may contain information about LBA for sectors that were found to be unreadable or unwriteable.

For LBA address space that is greater than 2 TB, the disk requires SCSI sense data in Descriptor format. This format is not supported by Windows 7 or Windows Server 2008 R2, which retrieve SCSI sense data in Fixed format. Therefore, the retrieved SCSI sense data either does not contain information about bad sectors or it contains incorrect information about bad sectors. Administrators should note this limitation when they look for bad sector LBA information that is recorded in the Windows event log.
It does not, however, mention Windows 8. But I'm too lazy to look into that right now.

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