Specifies the maximum number of bytes in a dump file on each volume of tape.
VOLSIZE parameter has a maximum value equal to the maximum value that can be stored in 64 bits on your platform.
VOLSIZE value can be specified as number followed by KB (number of kilobytes). For example,
VOLSIZE=2KB is the same as
VOLSIZE=2048. Similarly, MB specifies megabytes (1024 * 1024) and GB specifies gigabytes (1024**3). The shorthand for bytes remains B; the number is not multiplied to get the final file size (
VOLSIZE=2048B is the same as