A QUERY SETSYS command was issued and the setting of the EXTENDEDTTOC parameter of the SETSYS command is returned in this message. The following are the possible settings of the EXTENDEDTTOC parameter:

EXTENDEDTTOC=Y

EXTENDEDTTOC Y - Indicates that the installation specified SETSYS EXTENDEDTTOC(Y) and that the OCDS has been defined with a record size of 6144 bytes and can contain up to 106 data set entries. In this case, DFSMShsm can write up to 1,060,000 data sets per volume. Any TTOC record written for new DFSMShsm tape volume allocations while this value is in effect will contain 106 entries. Any tape volumes that were originally written or allocated when this value was not in effect are limited to 33 data set entries.

EXTENDEDTTOC=N

EXTENDEDTTOC N - Indicates that the installation specified SETSYS EXTENDEDTTOC(N). In this case, DFSMShsm can write up to 330,000 data sets per volume. Any TTOC record written for new DFSMShsm tape volume allocations while this value is in effect will contain 33 entries. Any tape volumes that were originally written or allocated when EXTENDEDTTOC(Y) was in effect will still allow up to 106 data set entries.