Hi Bill. I can confirm that in a format-3 record with all 13 slots filled, the DS3PTRDS field points to the CCHHR of the next format-3. And the "next" slot in the format-9 record then points to the next format-3.
I tried to confirm that there will be a second format-9 record for a file with > 133 extents. And that the DS9PTRDS field in the first format-9 will point to the second format-9 record. But I've not been able to create a dataset with > 123 extents. I believe 255 are possible. From z/OS 2.5 DFSMS Using Data Sets: "You can expand the space for a nonstriped VSAM component to 255 extents. For SMS-managed VSAM data sets, this extent limit is removed if Extent Constraint Removal is specified in the Data Class. The theoretical limit is then the maximum number of volumes (59), times 123 extents per volume, or 7257 extents." ...so I don't know if > 123 extents is possible on a single volume. Anyway, thanks again for your help! Wendell ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
