Block device drivers must respond to the following I/O control codes to interface properly with the FAT file system. For complete information on these codes, see the Reference.
I/O control code |
Description |
| DISK_IOCTL_GETINFO | Retrieves information about the block device. |
| DISK_IOCTL_READ | Reads data from the block device. |
| DISK_IOCTL_WRITE | Writes data to the block device. |
| DISK_IOCTL_SETINFO | Sets information about the block device. |
| DISK_IOCTL_FORMAT_MEDIA | Formats at a low level or reformats the block device. |
| DISK_IOCTL_GETNAME | Retrieves the name that file system drivers should use as the block device’s folder. |