IBM 1130 User Manual page 131

Record Format and Blocking
To select the record format and blocking, each of
the following factors must be considered:
1. File boundaries. Cards are limited to 80
columns of punched data, while the disk has 320
words that may be recorded on each sector.
Section
Subsections Page
20
40
I
50
01
2. Core storage requirements. Since
rocs
handles physical records for
I/o
operations and con-
tains a core storage area large enough to accommo-
date the physical record, you must supply a core
storage area for a logical record. In addition, for
efficient operation, multiple
I/O
areas may be re-
quired for the
I/o
devices.