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IBM System/370 Guide

IBM System/370
194 pages
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Page
of
GC20-173o-0
Revised
7/14/70
By
TNL GN20-2227
can
improve
I/O
throughput
by
making
more
efficient
use
of
channel
time.
These
direct
access
facilities
also
offer
higher
availability
through
use
of
advanced
hardware-only
and
program-assisted
error
correction
features.
The
3330
facility
provides.
high
capacity
and
fast
access
for
less
cost
per
bit.
It
is
a
growth
device
for
the
2314
facility
and
the
2321
Data
Cell
Drive
that
offers
increased
price
performance.
The
3330
facility
is
designed
to
be
used
in
every
area
in
which
direct
access
storage
is
needed,
for
example:
• As a
system
residence
device
and
for
program
library
storage
•
In
teleprocessing
applications
for
message
queuing
and
residence
of
online
applications
data
•
In
online,
data-based
applications,
such
as
management
information
systems,
airline
reservat.ions,
etc.
•
In
time-sharing
(or
interactive)
environments
as
a
swap
device
and
for
online
work
storage
(for
program
and
data
residence)
• As
high-speed
work
storage
for
sorting,
assembling,
and
link
editing
•
For
residence
of
data
indexes,
such
as
for
ISAM
data
sets
The
2305
facilities
offer
larger
capacity
and
faster
access
than
the
2301
drum.
For
Model
165
users,
the
2305
facilities
can
contribute
significantly
to
system
throughput
improvements
when
used:
• As
system
residence
devices
•
In
time-sharing
environments,
as
a
swap
device
and
for
program
and
data
residence
•
As
high-speed
work
storage
and
for
residence
of
data
indexes
SUMMARY
The
combination
of
new
and
improved
hardware
and
input/output
facilities,
enhanced
operating
systems
support,
integrated
emulation,
and
increased
system
availability
provided
by
the
Model
165
offers
Model
65
and
75
users
expanded
computing
capabilities
without
the
necessity
of
a
large
conversion
effort.
Little
or
no
time
need
be
spent
modifying
operational
System/360
code
or
7000-series
programs
currently
being
emulated.
Existing
CPU-bound
programs
can
execute
faster
because
of
the
increased
internal
performance
of
the
Model
165,
while
I/O-bound
programs
can
benefit
from
the
use
of
more
storage,
more
channels,
faster
I/O
devices,
and
block
multiplexing.
The
increased
power
and
new
functions
of
the
Model
165
provide
the
base
for
expanded
applications
growth
and
penetration
of
previously
marginal
application
areas.
The
increased
price
performance
of
the
Model
165
offers
the
user
the
opportunity
to
widen
his
data
processing
base
for
comparatively
less
cost
and
the
Model
165
can
be
an
integral
part
of
a
growth
plan
to
the
higher
performance
Model
195.
5

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IBM System/370 Specifications

General IconGeneral
BrandIBM
ModelSystem/370
CategoryServer
LanguageEnglish

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