The pebibyte per second is a multiple of the unit bit for Data Transfer Rate. The prefix pebi (symbol Pi) is defined in the International System of Units (SI) as a multiplier of 250 (1 pebi, short scale), and therefore 1 pebibyte per second = 250 bytes per second = 1125899906842624 bytes per second. The pebibyte per second has the unit symbol PiB/s.
kibibit per second
The kibibit per second is a unit of data transfer rate, using the standard binary prefix kibi, which has the symbol Ki, meaning 210. The unit symbol of the kibibit per second is Kibit / s. 1 kibibit / s = 210bits / s = 1,024 bits / s.