The 4381 Processor And Console - IBM 4381 Manual

different operational diskettes (called functional diskette 1 and functional
diskette 2) are provided for the two diskette drives.
Figure 1. The 4381 Processor and console
While the logical designs of the functional components of a 43 81 Processor are
very similar to the designs in a 4341 Processor, the physical design and most
physical components in a 4381 and 4341 Processor are different.
The logic package, the cooling components, power hardware components, the
support processor, the diskette drives, and the Channel-to-Channel Adapter
hardware are different in 4381 and 4341 Processors. These differences
improve speed and reliability, reduce cost, and/ or reduce space requirements.
The upright design of the 4381 Processor also reduces space requirements and
the 4381 Processor unit is the same size for all 4381 model groups (1 through
3 and 11through14). Any 4381 model group can be installed with or without
a raised floor and thus can be placed in end-user work areas.
The 4381 Model Group 12 has about twice the number of logic circuits and
provides twice the internal performance of the 4341 Model Group 2 but
occupies 69% of the floor space, uses 89% of the power, dissipates 83% of
the heat, and weighs 84% as much as a 4341 Model Group 2. The 4381
Model Group 11 provides twice the internal performance of the 4341 Model
Group 1 but occupies 69% of the floor space, uses 107% of the power,
dissipates 99% of the heat, and weighs 95% as much as the 4341 Model
Group 1. These comparisons assume a 4341 without a Channel-to-Channel
12
A
Guide
to the IBM
4381
Processor