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Demonstrates how to communicate with a SCSI device using pass-through IOCTLs in an application using DeviceIoControl API. |
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The SCSI Pass Through Interface sample demonstrates how to communicate with a SCSI device from Microsoft Win32 applications by using the DeviceIoControl API.
The storage port drivers provide an interface for Win32 applications to send SCSI CBDs (Command Descriptor Block) to SCSI devices. The interfaces are IOCTL_SCSI_PASS_THROUGH and IOCTL_SCSI_PASS_THROUGH_DIRECT. Applications can build a pass-through request and send it to the device by using this IOCTL.
Two command line parameters can be used with SPTI.EXE. The first parameter is mandatory. It is the name of the device to be opened. Typical values for this are drive letters such as "C:", or device names as defined by a class driver such as Scanner0, or the SCSI port driver name, ScsiN:, where N = 0, 1, 2, etc. The second parameter is optional and is used to set the share mode (note that access mode and share mode are different things) and sector size. The default share mode is (FILE_SHARE_READ | FILE_SHARE_WRITE) and the default sector size is 512. A parameter of "r" changes the share mode to only FILE_SHARE_READ. A parameter of "w" changes the share mode to only FILE_SHARE_WRITE. A parameter of "c" changes the share mode to only FILE_SHARE_READ and also changes the sector size to 2048. Typically, a CD-ROM device would use the "c" parameter.