This article refers to disk capacity in powers of two instead of powers of 10, which is the more common designation on storage device capacity labels.It also describes the requirements to address the full storage capability of these devices. This article outlines Microsoft support across all Windows versions since Windows XP. If the user intends to start the computer from one of these large disks, the system's base firmware interface must use the Unified Extensible Firmware Interface (UEFI) and not BIOS. This scheme supports addressing of the full range of storage capacity. In order for an operating system to fully support storage devices that have capacities that exceed 2 terabytes (2 TB, or 2 trillion bytes), the device must be initialized by using the GUID Partition Table (GPT) partitioning scheme.

This article discusses the manner in which Windows supports hard disks that have a storage capacity of more than 2 TB and explains how to initialize and partition disks to maximize space usage.Īpplies to: Windows Server 2022 Standard and Datacenter, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2 Original KB number: 2581408 Summary

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