Installation guide

Table F–1: The tapex Options and Option Parameters (cont.)
tapex Flag Flag and Parameter Descriptions
−F
Specifies the file-positioning tests. First, files are written to
the tape and verified. Next, every other file on the tape is
read. Then, the previously unread files are read by traversing
the tape backwards. Finally, random numbers are generated,
the tape is positioned to those locations, and the data is
verified. Each file uses a different record size. The following
parameters can be used with the −F flag:
−num_fi
Specifies the number of files.
−pos_ra
Specifies the number of random
repositions.
−pos_rs
Specifies the record size.
−rec_fi
Specifies the number of records per
file.
−G
Specifies the file-positioning tests on a tape containing data.
This flag can be used with the −F flag to run the file position
tests on a tape that has been written to by a previous
invocation of the −F test. To perform this test, you must use
the same test parameters (for example, record size and
number of files) that you used when you invoked the −F test
to write to the tape. No other data should have been written
to the tape since the previous −F test.
−g
Specifies random record size tests. This test writes records of
random sizes. It reads in the tape, specifying a large read
size; however, only the amount of data in the randomly sized
record should be returned. This test only checks return
values; it does not validate record contents. The following
parameter is used with the −g flag:
−rand_num
Specifies the number of records to
write and read.
−h
Displays a help message describing the tape exerciser.
−i
Specifies interactive mode. In this mode, you are prompted
for various test parameters. Typical parameters include the
record size and the number of records to write. The following
scaling factors are allowed:
• k or K (for kilobyte (1024 * n))
• b or B (for block (512 * n))
• m or M (for megabyte (1024 * 1024 * n))
For example, 10K would specify 10,240 bytes.
Using the System Exercise Tools F–15