A pebibyte is 
bytes. Although the term petabyte
is sometimes used to refer to 
bytes, such usage is deprecated in favor of the standard SI naming convention of
1 petabyte being equal to 
bytes.
Pebibyte
See also
Byte, Exbibyte, Gibibyte, Kibibyte, Mebibyte, Petabyte, TerabyteExplore with Wolfram|Alpha
References
National Institute of Standards. "Prefixes for Binary Multiples." https://physics.nist.gov/cuu/Units/binary.html.Referenced on Wolfram|Alpha
PebibyteCite this as:
Weisstein, Eric W. "Pebibyte." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Pebibyte.html