The Extended Disk Interface provides a higher performance path for a limited set of commands. The advantages of this interface are:

• Multiple I/O requests may be submitted in a single list.

• Each request may transfer data to or from discontinuous areas of memory.

• Each request may specify a priority to other I/O requests.

• A file system can directly call the device driver to submit I/O requests, rather than going through the OS/2 kernel.

• This interface may be used at interrupt time.

See Request Lists and Request Control for information about the format of the Extended Disk Interface "Request Lists".