Updating mbr

Because Microsoft disagreed with IBM on many important issues they eventually separated: OS/2 remained an IBM project and Microsoft worked to develop Windows NT and NTFS.

The HPFS file system for OS/2 contained several important new features.

NTFS is supported in other desktop and server operating systems as well.

Linux and BSD have a free and open-source NTFS driver, called NTFS-3G, with both read and write functionality.

Both of these are vastly higher than the 128 GB limit in Windows XP SP1.

NTFS v3.0 includes several new features over its predecessors: sparse file support, disk use quotas, reparse points, distributed link tracking, and file-level encryption called the Encrypting File System (EFS).

NTFS is optimized for 4 KB clusters, but supports a maximum cluster size of 64 KB.

Because partition tables on master boot record (MBR) disks support only partition sizes up to 2 TB, multiple GUID Partition Table (GPT or "dynamic") volumes must be combined to create a single NTFS volume larger than 2 TB.

Booting from a GPT volume to a Windows environment in a Microsoft supported way requires a system with Unified Extensible Firmware Interface (UEFI) and 64-bit support.

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