nominally kept full. This impact to insert performance is determined by the following 
factors: 
• A shorter time delay between eject and insert operations increases the inserts to 
non-HD frames (this is because eject operations will empty some number of Tier 0 
slots)
• A shorter distance between the I/O stations used for inserts and the HD frames 
decreases the insert move time to those frames
For more information about HD frames, see High density technology.
Parent topic: Library performance
Overview of main components
This section provides an illustration of the main components of the TS3500 Tape Library.
Figure 1 shows the main components of the TS3500 Tape Library. 
 1  Library frame  5  Door safety switch
 2  Cartridge storage slots  6  Upper I/O station
 3  Tape drive  7  Lower I/O station
 4  Front door  8  Operator panel
Figure 1. Main components of the IBM® System Storage™ TS3500 Tape Library Model L52. 
The front door is open and the side of the library is cut away to show the components.