Drive slots and HD slots are shown in Figure 14-6. The position and configuration of the frame and the installation of CoD features affect the total  available capacity of the L25. Table 14-5 shows available storage capacity based on possible  frame positions and configurations. The L25 frame comes standard with two I/O stations. Each I/O station houses a cartridge  magazine that allows importing or exporting cartridges from the library without requiring  reinventory or interruption of library operations. The cartridge magazine for each I/O station  on 3592 frames can hold up to 16 cartridges, providing a total of 32 I/O slots. Chapter 14. IBM TS4500 tape library  431 Figure 14-6 TS4500 model D25/L25 Table 14-5 Quantity of storage slots in L25 frame Licensed  features  Frame position Quantity of drives Quantity of I/O  slots Quantity of  storage slots Entry 1 1 - 12 32 100 Intermediate 1 1 - 12 32 200 Base 1 0 - 12 32 400 Base 2+ 0 - 16 32 400 HD CoD 1 0 - 12 32 550 HD CoD 2+ 0 - 16 32 660