As of z/OS® V1R7 the system no longer produces the ISAM segment. The value in SMF14SET, length of the ISAM segment, is always 0 because you cannot open an ISAM data set.
If you coded DSECT=YES when calling the IFGSMF14 macro, then it generates a DSECT statement at this point with the DSECT name with "ISAMX" appended to it. For example, if you did not code a label on the IFGSMF14 call, the name of this DSECT will be IFGSMFISAMX.
| Offsets | Name | Length | Format | Description | |
|---|---|---|---|---|---|
| 0 | 0 | SMF14RV6 | 2 | Reserved. | |
| 2 | 2 | SMFDCBMA | 1 | binary | Extension of I/O macro instruction (DCBMACRF) for ISAM. This field is mapped by DCBMACCT in the DCB mapping. |
| 3 | 3 | SMFDCBNL | 1 | binary | Number of index levels. This field is mapped by DCBNLVET in the DCB mapping. |
| 4 | 4 | SMFDCBR3 | 4 | binary | For each use of the data set, number of read or write accesses to an overflow record which is not first in a chain of such records. This field is mapped by DCBRORG3 in the DCB mapping. |
| 8 | 8 | SMFDCBNR | 4 | binary | Number of logical records in prime data area. This field is mapped by DCBNRECT in the DCB mapping. |
| 12 | C | SMFDCBR2 | 2 | binary | Number of tracks (whole or partial remaining in overflow area). This field is mapped by DCBRORG2 in the DCB mapping. |
| 14 | E | SMFDCBNO | 2 | binary | Number of logical records in overflow area. This field is mapped by DCBNOREC in the DCB mapping. |
| 16 | 10 | SMFDCBR1 | 2 | binary | Number of cylinder overflow areas that are full. This field is mapped by DCBRORG1 in the DCB mapping. |
| 18 | 12 | SMF14RV7 | 1 | Reserved. | |
| 19 | 13 | SMFDEBNI | 1 | binary | Number of extents in independent index area. This field is mapped by DEBNIEEQ in the DEB mapping. |
| 20 | 14 | SMFDEBNP | 1 | binary | Number of extents in prime data area. This field is mapped by DEBNPEEQ in the DEB mapping. |
| 21 | 15 | SMFDEBNO | 1 | binary | Number of extents in independent overflow area. This field is mapped by DEBNOEEQ in the DEB mapping. |
| 22 | 16 | SMFNCYLS | 2 | binary | Number of cylinders in independent index area. |
| 24 | 18 | SMFNPCYL | 2 | binary | Number of cylinders in prime data area. |
| 26 | 1A | SMFNOCYL | 2 | binary | Number of cylinders in independent overflow area. |