IBM System/370 Guide

Table 20.15.3 2305 facilities and 2301 Drum Storage characteristics
(continued)
Characteristic
Rotational
position sensing
Multiple
requesting
(allows
concurrent I/O
operations on
one module)
Record Overflow
Two-Channel
Switch
A device
contained in the
control unit
2305 Model 1
2. Correction of
data errors that
occur in the data
area of a record
possible by
programming using
information in
sense bytes
Standard feature
(90 sectors per
logical track)
Standard feature
(up to 8
concurrent
operations per
2305 module;
up to 7
supported by data
management)
Standard feature
Special feature
Yes to read the
control unit
microprogram and
diagnostic
programs from
magnetic disk
cartridges
20:20 THE 3211 PRINTER
2305 Model 2
Standard feature
(180 sectors per
track)
Standard feature,
same as Model 1
Standard feature
Special feature
Same as Model 1
2301 Drum
Not available
Not available,
one I/O operation
at a time
supported
Standard feature
Special feature
No
The 3211 is a high-speed line printer with front printing and new
features designed to reduce operator intervention. The 3211 can print
2000 alphameric lines per minute (with a 48-character set) and is
designed for industries and applications, such as utilities, aerospace,
finance, communications, and fabrication and assembly, that require
high print speeds.
The 3211 has a standard 132-print-position line, which can be
expanded to 150 positions as an option~ The number of print positions
does not affect printing speed. The Universal Character Set (UCS)
feature is standard and the interchangeable train cartridge contains
432 graphics. The cartridge character arrangement is unrestricted
and can be alphabetic, numeric, or special characters in any
combination. When the character arrangement is optimized for specific
printing loads, speeds of up to 2500 lines per minute can be attained.
The 3211 attaches to a 3811 Control unit. Unlike some models of
the 2821 control unit which can handle multiple devices, a 3811 controls
only one 3211 Printer.
New features of the 3211 include a powered forms stacker, an
automatic platen, and a tapeless carriage. The powered stacker
50

IBM System/370 Specifications

General

Brand	IBM
Model	System/370
Category	Server
Language	English