Figure 1. Frames in the IBM System Storage TS3500 Tape Library. A Model L23 or L53 
(base frame) is on the left. A Model D23 or D53 (expansion frame) is on the right and 
attaches to the base frame. 
• Dual accessors and service bays   
This section describes dual accessors and service bays and how they can enhance 
library performance.
• High density technology   
This section describes high density technology in the TS3500 Tape Library.
Parent topic: Overview
Related concepts
Supported tape drives
Web interface
Dual accessors and service bays
High density technology
Related reference
Mixing drives in frames
Mixing drives in a logical library
Mixing media in drives
Dual accessors and service bays