CARTS-MountEliminator is an optional CARTS component that temporarily redirects tape datasets to disk when needed for a scheduled job. After the job is finished, datasets are offloaded from disk and stacked to tape.
MountEliminator significantly reduces the number of tape mount requests when dataset I/Os can be satisfied from disk rather than tape. Batch throughput is typically faster as there is less contention for tape drives with fewer mount requests.
MountEliminator redirects tape datasets to disk automatically, without JCL changes, based upon values set within the CARTS-TapeStacker and MountEliminator control files. MountEliminator offloads these datasets back to tape if any one of the following triggering conditions occur:
MountEliminator offloads datasets to tape using standard CARTS-TapeStacker processing. Fewer tape mounts are needed because datasets are stacked when they are written to tape. For example, where five datasets can be stacked on a single cartridge (an average ratio), MountEliminator will write these five datasets to tape with a single mount, eliminating four potential mount requests.
Temporarily redirect tape datasets to disk when needed for a scheduled job.
Redirects tape datasets transparently, without JCL changes
Reduces the number of tape mount requests when dataset I/Os are satisfied from disk rather than tape
Off-loads datasets to tape using standard CARTS-TapeStacker processing
Fewer tape mounts are needed because datasets are stacked when they are written to tape
Key dataset control features.
Datasets can be read directly from tape after they have been stacked
Datasets do not have to be loaded back to disk to be read or written
You control the number of DASD volumes allocated
You control which datasets are redirected or written directly to tape
All original creation job statistics are maintained in the TMS Tape Management Catalog (TMC)
Leaves the MVS catalog in control
CARTS supports tape robots and their accompanying software from these vendors.
StorageTek HSC
Memorex (SUTMYN) LMS
GRAU Bosch ATL