The 3490-A20 is a 36-track, 2 Control Unit
component for an IBM 3490 tape subsystem. The
IBM 3490 Enhanced Capability (3490E) Model A20
Control Unit supports the Models B20 and B40
Tape Drive Units. The A20 provides granularity
from a minimum 2x2 (A20 x B20) configuration to
a maximum 2x16 (A20 x Four B40s) configuration.
Standard features include: Improved Data
Recording Capability, an 8 Mb buffer, Dual
Communications Capability, and improved
utilization of ES Connection* (ESCON*) adapters
providing new possibilities in performance,
connectivity, and remote tape operations.
IBM 3490 Tape
The IBM 3490 is a family of Magnetic Tape Subsystems
designed to provide significant tape subsystem
performance and cartridge capacity improvements.
The 3490 Magnetic Tape Subsystem family offers
solutions to business requirements in the areas of
adaptability, maintenance, reliability and
availability, usability, and exploitation. All 3490
Magnetic Tape Subsystems can attach to multiple
processors and are supported by MVS, VM, AIX/ESA*,
AIX/6000*, and OS/400*.
The IBM 3490 family's innovative packaging
provides environmental characteristics that are far
superior to those of previous tape technologies.