Syntax

Figure 1 shows the syntax for the TAPELEN keyword.

Figure 1. TAPELEN Keyword Syntax

[TAPELEN (1 | 2)]

The valid values for TAPELEN are:

1: Refers to a normal tape cartridge with a base capacity of 416 MB for a 3490E tape. This size is the cartridge capacity without IDRC and with 36 tracks. When IDRC is enabled, you can achieve more than the cartridge capacity.
2: Refers to the Enhanced Capacity Cartridge System Tape, which is twice the length of the tape on a physical cartridge. With the Enhanced Capacity Cartridge System Tape, the effective capacity of a tape cartridge is up to 2500MB.

See z/OS DFSMS Implementing System-Managed Storage for more information on advanced cartridge hardware.