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Windows and GPT support

Q.	Can Windows XP x64 read, write, and boot from GPT disks?
 	 
A.	Windows XP x64 Edition can use GPT disks for data only.

Q.	Can the 32-bit version of Windows XP read, write, and boot from GPT disks?
 	 
A.	No. The 32-bit version will see only the (...)
Q.	Can Windows XP x64 read, write, and boot from GPT disks?
 	 
A.	Windows XP x64 Edition can use GPT disks for data only.

Q.	Can the 32-bit version of Windows XP read, write, and boot from GPT disks?
 	 
A.	No. The 32-bit version will see only the Protective MBR. The EE partition will not be mounted or otherwise exposed to application software.

Q.	Can the 32- and 64-bit versions of Windows Server 2003 read, write, and boot from GPT disks?
 	 
A.	Starting with Windows Server 2003 Service Pack 1, all versions of Windows Server can use GPT partitioned disks for data. Booting is only supported for 64-bit editions on Itanium-based systems.

Q.	Can Windows 7, Windows Vista, and Windows Server 2008 read, write, and boot from GPT disks?
 	 
A.	Yes, all versions can use GPT partitioned disks for data. Booting is only supported for 64-bit editions on UEFI-based systems.

Q.	Can Windows 2000, Windows NT 4, or Windows 95/98 read, write, and boot from GPT?
 	 
A.	No. Again, legacy software will see only the Protective MBR.

Q.	Is it possible to move a GPT disk to another computer?
 	 
A.	You can move, or migrate, data-only GPT disks to other systems that are running Windows XP (64-bit edition only) or later versions of the operating system (32- or 64-bit editions). You can migrate data-only GPT disks after the system has been shutdown or after the safe removal of the disk.

Q.	What about mixing and matching GPT and MBR disks on the same system?
 	 
A.	
GPT and MBR disks can be mixed on systems that support GPT, as described earlier. However, you must be aware of the following restrictions:
Systems that support UEFI require that boot partition must reside on a GPT disk. Other hard disks can be either MBR or GPT.
Both MBR and GPT disks can be present in a single dynamic disk group. Volume sets can span both MBR and GPT disks.
Q.	What about removable media?
 	 
A.	Removable media must be MBR or "superfloppy."

Q.	What is a superfloppy?
 	 
A.	
Removable media without either GPT or MBR formatting is considered a "superfloppy." The entire media is treated as a single partition.
The media manufacturer performs any MBR partitioning of removable media. If the media does have an MBR, only one partition is supported. There is little user-discernible difference between MBR-partitioned media and superfloppies.
Examples of removable media include floppy disk drives, JAZ disk cartridges, magneto-optical media, DVD-ROM, and CD-ROM. Hard disk drives on external buses such as SCSI or IEEE 1394 are not considered removable.
Q.	What is the default behavior of Windows XP 64-Bit Edition Version 2003 when partitioning media?
 	 
A.	For Windows XP 64-Bit Edition Version 2003 only (for Itanium-based systems), fixed disks are partitioned by using GPT partitioning. GPT disks can be converted to MBR disks only if all existing partitioning is first deleted, with associated loss of data.

Q.	What is the default behavior of the 32-bit version of Windows XP, Windows Server 2003 and Windows XP x64 when partitioning media?
 	 
A.	Only MBR disks can be used.

Q.	How can a drive letter in the operating system be mapped to a partition in UEFI firmware?
 	 
A.	There is no inherent mapping between drive letter and partition that can be used to determine one from the other. A basic data partition must be identified by its partition GUID.

Q.	How can an ESP partition be created?
 	 
A.	ESP partitions can be created by using the UEFI firmware utility Diskpart.efi or the Windows command line utility Diskpart.exe.

Q.	What can be changed on a partition?
 	 
A.	You should not change any partition header entry directly. Do not use disk tools or utilities to make alterations or changes.

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