Hitachi MK-96RD647-01 manual Bidirectional Data Transfer

Bidirectional Data Transfer

FX supports bidirectional data transfer for both fixed-length and variable- length z/OS datasets. Bidirectional data transfer involves transferring data from z/OS datasets to open-system files and then back to the original z/OS datasets again. The requirements for bidirectional data transfer are:

•For all FXmto operations, do not specify the record description word (RDW) option. If the RDW option is specified for an FXmto data transfer, the subsequent FXotm target dataset will not be compatible with the original dataset.

•For FXmto with fixed-length datasets, do not specify the delimiter option, since the data entities are extracted by length. If you add delimiters for the FXmto transfer, the subsequent FXotm target dataset will not be compatible with the original dataset.

•For FXmto with variable-length datasets, you must add delimiters but not padding. If delimiters are not added or if padding is added for the FXmto transfer, the subsequent FXotm target dataset will not be compatible with the original dataset.

•For FXotm operations do not specify the delimiter option if the source file contains the same character(s) as the delimiter (CR and/or LF) but used for purposes other than delimiting data entities. If you specify the delimiter option for FXotm, FCU will interpret all occurrences of the specified delimiter character(s) as delimiters, which can create a dataset with corrupt records or generate an error condition.

2-36 About Cross-OS File Exchange Operations

Hitachi USP V Cross-OS File Exchange User’s Guide