Tips for archiving to disk

If you choose to archive to disk, following certain tips can help you avoid problems.

All archive log data sets that are allocated on disk must be cataloged. If you choose to archive to disk, the field CATALOG DATA of installation panel DSNTIPA must contain YES. If this field contains NO, and you decide to place archive log data sets on disk, you receive message DSNJ072E each time an archive log data set is allocated, although the Db2 subsystem still catalogs the data set.

If you use disk storage, ensure that the primary and secondary space quantities and block size and allocation unit are large enough so that the disk archive log data set does not attempt to extend beyond 15 volumes. The possibility of unwanted z/OS® B37 or E37 abends during the offload process is thereby minimized. Primary space allocation is set with the PRIMARY QUANTITY field of the DSNTIPA installation panel. If the archive log data sets are allocated with the DSNTYPE=LARGE attribute, z/OS DFSMS allows the data sets to be up to 16777215 tracks (1118481 cylinders) on each volume. If the archive log data sets are allocated without the DSNTYPE=LARGE attribute, z/OS DFSMS limits the data sets to less than or equal to 65535 tracks (4369 cylinders) on each volume.