The glossary below contains many of the terms you will find in common use throughout the Symantec Security Response website. Please refer to this list to find definitions of terms and answers to other Internet security-related questions.

direct I/O

An unbuffered form of I/O that bypasses the kernel’s buffering of data. With direct I/O, the file system transfers data directly between the disk and the user-supplied buffer.

See buffered I/O and unbuffered I/O.