# Microsoft basic data partition

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{{Short description|Aspect of a computer disk file system}}
{{Use mdy dates|date=October 2024}}
[[File:Microsoft Reserved Partition inside a GUID Partition Table screenshot.webp|upright=1.5|alt=Screenshot of GNU Parted showing Microsoft basic data partitions within a GUID Partition Table|thumb|Example of Microsoft basic data partitions within a GUID Partition Table (GPT). [GNU Parted](/source/GNU_Parted) marked one with <code>msftdata</code> flag (visible), the other one is a [Windows Recovery Environment](/source/Windows_Recovery_Environment) partition (hidden)]]
{| class="wikitable floatright"
|+ Microsoft-defined GPT attribute flags for BDPs<ref>{{cite web|url=https://technet.microsoft.com/en-us/library/cc739412(v=ws.10).aspx |work=Microsoft TechNet |title=How Basic Disks and Volumes Work | date=March 28, 2003}}</ref>
|-
! Bit number !! Meaning
|-
| 60 || The volume is read-only and may not be mounted read-write.
|-
| 62 || The volume is hidden.
|-
| 63 || The operating system may not automatically assign a drive letter to the volume.
|}
In [Microsoft](/source/Microsoft) [operating system](/source/operating_system)s, when using [basic disk](/source/Logical_Disk_Manager) partitioned with [GUID Partition Table](/source/GUID_Partition_Table) (GPT) layout, a '''basic data partition''' ('''BDP''') is any [partition](/source/partition_(computing)) identified with [Globally Unique Identifier](/source/Globally_Unique_Identifier) (GUID) of {{mono|EBD0A0A2-B9E5-4433-87C0-68B6B72699C7}}.<ref name=GPTFAQ>{{cite web|url=http://www.microsoft.com/whdc/device/storage/GPT_FAQ.mspx|work=Windows and GPT FAQ|title=Windows GPT Implementation}}</ref>

According to Microsoft, the basic data partition is the equivalent to [master boot record](/source/master_boot_record) (MBR) partition types {{mono|[0x06](/source/Partition_type)}} ([FAT16B](/source/FAT16B)), {{mono|[0x07](/source/Partition_type)}} ([NTFS](/source/NTFS) or [exFAT](/source/exFAT)), and {{mono|[0x0B](/source/Partition_type)}} ([FAT32](/source/FAT32)).<ref name=GPTFAQ /> In practice, it is equivalent to {{mono|[0x01](/source/Partition_type)}} ([FAT12](/source/FAT12)), {{mono|[0x04](/source/Partition_type)}} ([FAT16](/source/FAT16)), {{mono|[0x0C](/source/Partition_type)}} (FAT32 with [logical block addressing](/source/logical_block_addressing)), and {{mono|[0x0E](/source/Partition_type)}} (FAT16 with logical block addressing) types as well.

A basic data partition can be formatted with any [file system](/source/file_system), although most commonly BDPs are formatted with the NTFS, exFAT, or FAT32 file systems.  To programmatically determine which file system a BDP contains, Microsoft specifies that one should inspect the [BIOS Parameter Block](/source/BIOS_Parameter_Block) that is contained in the BDP's [Volume Boot Record](/source/Volume_Boot_Record).

When a Microsoft operating system converts a GPT-partitioned basic disk to a [dynamic disk](/source/dynamic_disk), all BDPs are combined and converted to a single [Logical Disk Manager](/source/Logical_Disk_Manager) data partition identified with GUID {{mono|AF9B60A0-1431-4F62-BC68-3311714A69AD}}. This is analogous to the conversion from partition types {{mono|0x01}}, {{mono|0x04}}, {{mono|0x06}}, {{mono|0x07}}, {{mono|0x0B}}, {{mono|0x0C}}, and {{mono|0x0E}} to partition type {{mono|[0x42](/source/Partition_type)}} on MBR partitioned disks.

Linux used the same partition type GUID for basic data partition as Windows prior to introduction of a Linux specific Data Partition GUID {{mono|0FC63DAF-8483-4772-8E79-3D69D8477DE4}}.<ref name="RodSmithMLpost">{{cite mailing list|last=Smith|first=Rod|title=Need for a Unique Linux GPT GUID Type Code|mailing-list=bug-parted|date=June 23, 2011|url=http://lists.gnu.org/archive/html/bug-parted/2011-06/msg00026.html |via=lists.gnu.org |access-date=April 10, 2013}}</ref><ref name="RodSmithPersonalWebsite">{{citation |last=Smith|first=Rod|title=Using the GPT Linux Filesystem Data Type Code|date=June 10, 2012|url=https://www.rodsbooks.com/linux-fs-code/}}</ref>

== References ==
{{Reflist}}

== See also ==
* [Disk partitioning](/source/Disk_partitioning)
* [EFI system partition](/source/EFI_system_partition) (ESP), a reserved partition on GPT disk
* [Microsoft Reserved Partition](/source/Microsoft_Reserved_Partition) (MSR), a reserved partition on GPT disk

Category:Disk file systems
Category:Disk partitions

{{Compu-storage-stub}}

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Adapted from the Wikipedia article [Microsoft basic data partition](https://en.wikipedia.org/wiki/Microsoft_basic_data_partition) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Microsoft_basic_data_partition?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.