To transfer a variable blocked file, you must build an intermediate file on the source mainframe and then transfer it through the network to the destination in binary mode. When the file is received at the destination host, FTP is unable to replicate the original file as data integrity is lost.Īlthough FTP provides capability by way of the RDW option to include the length of the data being transferred to a remote system at the beginning of each record, it becomes part of the data for that record and will not be recognized by the FTP at the final destination as an RDW. If you transfer the file in binary mode, it will not work as there is no record delimiter inserted into the data stream to separate the individual records. If the file is first transferred to an intermediate non-z/OS server before being sent to its final destination, the above technique will not work because the above transfer type is EBCDIC which will not be supported.
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