For example, if frames 1 - 4 contain 3592 tape drives and cartridges and frames 5 - 16  contain Ultrium tape drives and cartridges, the web interface can be used to specify frame 4  as the preferred zone for accessor A. Accessor A then performs operations for the 3592 tape  drives while accessor B performs operations for the Ultrium tape drives. The service bay A option allows service bay A to be designated as the preferred zone for  accessor A. This selection gives accessor A access to service bay A, while accessor B  performs operations for the rest of the library string. Preferred zone is set up by using the tape library Specialist Web interface. Important:  Preferred zoning applies only to drive frames, which means that if all drives are  in frame 1, 2, and 3 and preferred zoning is set at frame 4, the B accessor is never used  because it has no drives to service. Correctly setting the preferred zones can improve drive  mount performance. The TS3500 tape library shuttle complex enables extreme scalability of over 300,000 LTO  cartridges (or over 2250 PB of uncompressed TS1150 data) in a single library image by  supporting transport of cartridges from one TS3500 tape library string to another TS3500 tape  library string. Application software that supports this new capability can move tape cartridges  directly from its home logical library to the destination logical library.  Shuttle connections span High-Density TS3500 tape library S24 or S54 frames from different  TS3500 tape library strings. The TS3500 tape library shuttle complex supports new and  existing TS3500 tape library installations and is particularly suited for High Performance  Storage System (HPSS) environments. Important:  HPSS and Tape System Library Manager (TSLM) are the library management  solutions that support the TS3500 tape library shuttle complex. The shuttle complex consists of the following main components: 13.1.5 TS3500 tape library shuttle complex (Model SC1) GLYPH<SM590000> TS3500 tape libraries with model SC1 GLYPH<SM590000> Library Management Software (HPSS or TSLM) with Shuttle Call System (SCS) GLYPH<SM590000> Total Storage System Console (TSSC) 366  IBM Tape Library Guide for Open Systems