Chapter 7. Tape Concepts; Formatting The Tape - IBM 5110 User Manual

Chapter 7. Tape Concepts
There are 204K bytes (1 K
=
1024 bytes) of tape storage available on
an IBM Data Cartridge. This tape storage is used for file headers,
workspace files, and data files. In this section, the following topics are
discussed:
• How to format the tape
• How to determine the amount of storage on a tape cartridge that is
actually available to you
FORMATTING THE TAPE
You must use the )MARK command to format files on the tape before
you can store the contents of the active workspace or data records on
the tape. For example:
)
MAI~I(
:1.0
\
I'"
j
~)
.'
\
~Starting
File Number
Number of Files to Mark
Size of the Files in Increments of 1,024 (1 K)
Bytes. In this case, the size of the marked
files is 10,240 (10x 1,024) bytes.
Once the previous )MARK command is successfully completed by the
5110, the tape is formatted as follows:
the beginning of
the tape storage.
Each file contains
10,240 bytes of
storage.
This file header
indicates end of
Tape Concepts 75