{{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 marked one with <code>msftdata</code> flag (visible), the other one is a 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 operating systems, when using basic disk partitioned with GUID Partition Table (GPT) layout, a '''basic data partition''' ('''BDP''') is any partition identified with 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 (MBR) partition types {{mono|0x06}} (FAT16B), {{mono|0x07}} (NTFS or exFAT), and {{mono|0x0B}} (FAT32).<ref name=GPTFAQ /> In practice, it is equivalent to {{mono|0x01}} (FAT12), {{mono|0x04}} (FAT16), {{mono|0x0C}} (FAT32 with logical block addressing), and {{mono|0x0E}} (FAT16 with logical block addressing) types as well.
A basic data partition can be formatted with any 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 that is contained in the BDP's Volume Boot Record.
When a Microsoft operating system converts a GPT-partitioned basic disk to a dynamic disk, all BDPs are combined and converted to a single 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}} 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 * EFI system partition (ESP), a reserved partition on GPT disk * Microsoft Reserved Partition (MSR), a reserved partition on GPT disk
Category:Disk file systems Category:Disk partitions
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