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Disk Management Control Codes

The following table identifies the control codes that are used in disk management.

In this section

Control Code	Description
IOCTL_DISK_ARE_VOLUMES_READY	Waits for all volumes on the specified disk to be ready for use.
IOCTL_DISK_CREATE_DISK	Initializes the specified disk and disk partition table using the information in the CREATE_DISK structure.
IOCTL_DISK_DELETE_DRIVE_LAYOUT	Removes the boot signature from the master boot record, so that the disk will be formatted from sector zero to the end of the disk.
IOCTL_DISK_FORMAT_TRACKS	Formats a specified, contiguous set of tracks on a floppy disk. To provide additional parameters, use IOCTL_DISK_FORMAT_TRACKS_EX instead.
IOCTL_DISK_FORMAT_TRACKS_EX	Formats a specified, contiguous set of tracks on a floppy disk.
IOCTL_DISK_GET_CACHE_INFORMATION	Retrieves the disk cache configuration data.
IOCTL_DISK_GET_DISK_ATTRIBUTES	Retrieves the attributes of the specified disk device.
IOCTL_DISK_GET_DRIVE_GEOMETRY	Retrieves information about the physical disk's geometry: type, number of cylinders, tracks per cylinder, sectors per track, and bytes per sector.
IOCTL_DISK_GET_DRIVE_GEOMETRY_EX	Retrieves extended information about the physical disk's geometry: type, number of cylinders, tracks per cylinder, sectors per track, and bytes per sector.
IOCTL_DISK_GET_DRIVE_LAYOUT	Retrieves information for each entry in the partition tables for a disk.
IOCTL_DISK_GET_DRIVE_LAYOUT_EX	Retrieves extended information for each entry in the partition tables for a disk.
IOCTL_DISK_GET_LENGTH_INFO	Retrieves the length of the specified disk, volume, or partition.
IOCTL_DISK_GET_PARTITION_INFO	Retrieves information about the type, size, and nature of a disk partition.
IOCTL_DISK_GET_PARTITION_INFO_EX	Retrieves extended information about the type, size, and nature of a disk partition.
IOCTL_DISK_GROW_PARTITION	Enlarges the specified partition.
IOCTL_DISK_IS_WRITABLE	Determines whether the specified disk is writable.
IOCTL_DISK_PERFORMANCE	Enables performance counters that provide disk performance information.
IOCTL_DISK_PERFORMANCE_OFF	Disables the performance counters that provide disk performance information.
IOCTL_DISK_REASSIGN_BLOCKS	Directs the disk device to map one or more blocks to its spare-block pool.
IOCTL_DISK_REASSIGN_BLOCKS_EX	Directs the disk device to map one or more blocks to its spare-block pool.
IOCTL_DISK_RESET_SNAPSHOT_INFO	Clears all Volume Shadow Copy Service (VSS) hardware-based shadow copy (also called "snapshot") information from the disk. To perform this operation, call the DeviceIoControl function with the following parameters.
IOCTL_DISK_SET_CACHE_INFORMATION	Sets the disk configuration data.
IOCTL_DISK_SET_DISK_ATTRIBUTES	Sets the attributes of the specified disk device.
IOCTL_DISK_SET_DRIVE_LAYOUT	Partitions a disk as specified by drive layout and partition information data.
IOCTL_DISK_SET_DRIVE_LAYOUT_EX	Partitions a disk according to the specified drive layout and partition information data.
IOCTL_DISK_SET_PARTITION_INFO	Sets partition information for the specified disk partition.
IOCTL_DISK_SET_PARTITION_INFO_EX	Sets partition information for the specified disk partition, including layout information for AT and EFI (Extensible Firmware Interface) partitions.
IOCTL_DISK_UPDATE_PROPERTIES	Invalidates the cached partition table and re-enumerates the device.
IOCTL_DISK_VERIFY	Verifies the specified extent on a fixed disk.
IOCTL_STORAGE_QUERY_PROPERTY	Returns the properties of a storage device or adapter. The request indicates the kind of information to retrieve, such as the inquiry data for a device or the capabilities and limitations of an adapter. IOCTL_STORAGE_QUERY_PROPERTY can also be used to determine whether the port driver supports a particular property or which fields in the property descriptor can be modified with a subsequent change-property request.