GPT Attributes
DiskPart
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Syntax: gpt attributes= n
On basic GPT disks, assigns the GPT attribute(s) to the partition with focus. GPT partition attributes give additional information about the use of the partition. Some attributes are specific to the partition type GUID.
Important
Changing the GPT attributes might cause your basic data volumes to be unmountable or fail to be assigned drive letters. Unless you are an OEM or an IT professional experienced with GPT disks, do not change GPT attributes.
n
The hexadecimal that pertains to the attribute that you intend to
apply to the partition with focus. The GPT attribute field is a
64-bit field that contains two subfields. The higher field is
interpreted only in the context of the partition ID, while the lower
field is common to all partition IDs.
All partitions have the following attribute:
-
0x000000000000001 marks the partition as required. This indicates to all disk management utilities that the partition must not be deleted. The EFI system partition contains only those binaries necessary to start the operating system. This makes it easy for OEM- or operating system-specific binaries to be placed in other partitions.
For basic data partitions, the following attribute is defined:
-
0x8000000000000000 prevents the partition from having a drive letter automatically assigned. By default, each partition is assigned a new drive letter. Setting this attribute ensures that, when a disk is moved to a new computer, a new drive letter will not be automatically generated. Instead, the user can manually assign drive letters.
Note
Other attributes can be added at any time.