Microsoft basic data partition: Difference between revisions

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|+ 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>

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In [[Microsoft]] [[operating system]]s, when using [[Logical Disk Manager#Basic and dynamic disks and volumes|basic disk]] partitioned with [[GUID Partition Table]] (GPT) layout, a '''basic data partition''' ('''BDP''') is any [[partition (computing)|partition]] identified with [[Globally Unique Identifier]] (GUID) of <tt>{{mono|EBD0A0A2-B9E5-4433-87C0-68B6B72699C7</tt>}}.<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 <tt>{{mono|[[Partition type#PID 06h|0x06]]</tt>}} ([[FAT16B]]), <tt>{{mono|[[Partition type#PID 07h|0x07]]</tt>}} ([[NTFS]] or [[exFAT]]), and <tt>{{mono|[[Partition type#PID 0Bh|0x0B]]</tt>}} ([[FAT32]]).<ref name=GPTFAQ /> In practice, it is equivalent to <tt>{{mono|[[Partition type#PID 01h|0x01]]</tt>}} ([[FAT12]]), <tt>{{mono|[[Partition type#PID 04h|0x04]]</tt>}} ([[FAT16]]), <tt>{{mono|[[Partition type#PID 0Ch|0x0C]]</tt>}} (FAT32 with [[logical block addressing]]), and <tt>{{mono|[[Partition type#PID 0Eh|0x0E]]</tt>}} (FAT16 with logical block addressing) types as well.

In the GPT scheme, BDPs are the only partition types which [[Windows XP]] 64-bit can mount and normally [[Drive letter assignment|assign drive letters]].<ref>{{cite web|url=http://technet2.microsoft.com/WindowsServer/en/Library/ca099518-dde5-4eac-a1f1-38eff6e3e5091033.mspx|work=Microsoft TechNet|title=DiskPart documentation|deadurl=yes|archiveurl=https://web.archive.org/web/20060502084506/http://technet2.microsoft.com/WindowsServer/en/Library/ca099518-dde5-4eac-a1f1-38eff6e3e5091033.mspx|archivedate=2006-05-02|df=}}</ref>

A Basicbasic Datadata Partitionpartition can be formatted with any [[filesystemfile system]], although most commonly BDPs are formatted with the NTFS, exFAT, or FAT32 filesystemsfile systems. To programaticallyprogrammatically determine which filesystemfile system a BDP contains, Microsoft specifies that one should inspect the [[BIOS Parameter Block]] that is contained in the BDP's [[Volume Boot Record]].

According to Microsoft, the basic data partition is the equivalent to [[master boot record]] (MBR) partition types <tt>[[Partition type#PID 06h|0x06]]</tt> ([[FAT16B]]), <tt>[[Partition type#PID 07h|0x07]]</tt> ([[NTFS]] or [[exFAT]]), and <tt>[[Partition type#PID 0Bh|0x0B]]</tt> ([[FAT32]]).<ref name=GPTFAQ /> In practice, it is equivalent to <tt>[[Partition type#PID 01h|0x01]]</tt> ([[FAT12]]), <tt>[[Partition type#PID 04h|0x04]]</tt> ([[FAT16]]), <tt>[[Partition type#PID 0Ch|0x0C]]</tt> (FAT32 with [[logical block addressing]]), and <tt>[[Partition type#PID 0Eh|0x0E]]</tt> (FAT16 with logical block addressing) types as well.

When a Microsoft operating system converts a GPT-partitioned [[Logical Disk Manager#Basic and dynamic disks and volumes|basic disk]] to a [[dynamic disk]], all BDPs are combined and converted to a single [[Logical Disk Manager]] data partition identified with GUID <tt>{{mono|AF9B60A0-1431-4F62-BC68-3311714A69AD</tt>}}. This is analogous to the conversion from partition types <tt>{{mono|0x01</tt>}}, <tt>{{mono|0x04</tt>}}, <tt>{{mono|0x06</tt>}}, <tt>{{mono|0x07</tt>}}, <tt>{{mono|0x0B</tt>}}, <tt>{{mono|0x0C</tt>}}, and <tt>{{mono|0x0E</tt>}} to partition type <tt>{{mono|[[Partition type#PID 42h|0x42]]</tt>}} on MBR partitioned disks.

A Basic Data Partition can be formatted with any [[filesystem]], although most commonly BDPs are formatted with the NTFS, exFAT, or FAT32 filesystems. To programatically determine which filesystem a BDP contains, Microsoft specifies that one should inspect the [[BIOS Parameter Block]] that is contained in the BDP's [[Volume Boot Record]].

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

When a Microsoft operating system converts a GPT-partitioned [[Logical Disk Manager#Basic and dynamic disks and volumes|basic disk]] to a [[dynamic disk]], all BDPs are combined and converted to a single [[Logical Disk Manager]] data partition identified with GUID <tt>AF9B60A0-1431-4F62-BC68-3311714A69AD</tt>. This is analogous to the conversion from partition types <tt>0x01</tt>, <tt>0x04</tt>, <tt>0x06</tt>, <tt>0x07</tt>, <tt>0x0B</tt>, <tt>0x0C</tt>, and <tt>0x0E</tt> to partition type <tt>[[Partition type#PID 42h|0x42]]</tt> 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 <tt>0FC63DAF-8483-4772-8E79-3D69D8477DE4</tt>.<ref name="RodSmithMLpost">{{cite mailing list|last=Smith|first=Rod|title=Need for a Unique Linux GPT GUID Type Code|mailinglist=bug-parted|date=23 June 2011|url=http://lists.gnu.org/archive/html/bug-parted/2011-06/msg00026.html |agency=lists.gnu.org |accessdate=10 April 2013}}</ref>

== References ==

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== See also ==

* [[Disk partitioning]]

* [[EFI Systemsystem Partitionpartition]] (ESP), a reserved partition on GPT disk

* [[Microsoft Reserved Partition]] (MSR), a reserved partition on GPT disk