IOCTL_DISK_GROW_PARTITION IOCTL (ntdddisk.h)
Increases the size of an existing partition. It is used in conjunction with IOCTL_DISK_UPDATE_DRIVE_SIZE to extend a disk, so that it will contain a new free space area, and then to extend an existing partition on the disk into the newly attached free space. It takes a DISK_GROW_PARTITION structure as the only parameter. For this operation to work, the space after the specified partition must be free. A partition cannot be extended over another existing partition.
Major code
Input buffer
The buffer at Irp->AssociatedIrp.SystemBuffer contains the DISK_GROW_PARTITION values - that will be used to increase the size of the partition.
Input buffer length
Parameters.DeviceIoControl.InputBufferLength in the I/O stack location of the IRP indicates the size, in bytes, of the buffer made available to the driver, which must be >= sizeof(DISK_GROW_PARTITION). Otherwise, the driver returns with an error status of STATUS_BUFFER_TOO_SMALL.
Output buffer
None.
Output buffer length
None.
Status block
The Status field is set to STATUS_SUCCESS, or possibly to STATUS_BUFFER_TOO_SMALL, STATUS_INVALID_PARAMETER, STATUS_UNSUCCESSFUL, or STATUS_DRIVER_INTERNAL_ERROR.
Requirements
| Requirement | Value |
|---|---|
| Header | ntdddisk.h (include Ntdddisk.h) |
See also
Feedback
Coming soon: Throughout 2024 we will be phasing out GitHub Issues as the feedback mechanism for content and replacing it with a new feedback system. For more information see: https://aka.ms/ContentUserFeedback.
Submit and view feedback for