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I/O Requests for Mass Storage Drivers

This section contains the following information:

Blocking Direct Write Operations to Volumes and Disks

Storage I/O Requests

General Storage I/O Control Codes

Disk I/O Control Codes

CD-ROM I/O Control Codes

DVD I/O Control Codes

IDE I/O Control Codes

Tape I/O Control Codes

Changer I/O Control Codes

SCSI Port I/O Control Codes

MPIO I/O Control Codes

Mount Manager I/O Control Codes

Volume Manager I/O Control Codes

NV Cache Manager I/O Control Codes

Virtual Miniport I/O Control Codes

Storage Silo Driver I/O Control Codes

This section describes the basic set of I/O requests that are sent to drivers of storage devices and to intermediate drivers that are layered above them. It describes the system-defined I/O control codes that must be handled by all storage devices and those that must be handled by a particular type of device.

Most I/O control codes listed in this section can be issued from either a kernel-mode driver or a user-mode application. When the I/O control code is issued from a kernel-mode driver, the caller provides an I/O Request Packet (IRP) that contains an IO_STATUS_BLOCK data structure. This data structure is used to return error information to the caller. When the I/O control code is issued from a user-mode application with the DeviceIocontrol routine, the caller can obtain error information by calling the GetLastError routine.



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