When a 32-bit application sends an IOCTL_SFFDISK_DEVICE_COMMAND request on a computer that is running a 64-bit version of Windows Vista, the device driver returns an incorrect value
Consider the following scenario:
- You are running a 32-bit application on a computer that is running a 64-bit version of Windows Vista.
- The application sends an IOCTL_SFFDISK_DEVICE_COMMAND request to a Secure Digital (SD) card.
In this scenario, the device driver returns an incorrect value. This problem occurs even though you have applied hotfix 944240 on the computer.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB948870.

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