Installation guide

−Q
Suppresses performance analysis of read transfers. This flag
only performs write performance testing. To perform only read
testing and to skip the write performance tests, specify the −R
flag. The −Q flag can be used with the −p test flag.
−R
Opens the disk in read-only mode. This flag can be used with
all test flags.
−S
Performs transfers to sequential disk locations. If this flag is
not specified, transfers are done to random disk locations. This
flag can be used with the −p, −r, and −w test flags.
−T
Directs output to the terminal. This flag is useful if output is
directed to a log file by using the −o flag. If you specify the −T
flag after the −o flag, output is directed to both the terminal
and the log file. The −T flag can be used with all test flags.
−Y
Does not prompt you to confirm that you want to continue the
test if file systems are found when the disk is examined;
testing proceeds.
In addition to the flags, you can also specify test parameters. You can
specify test parameters on the diskx command line or interactively with
the −i flag. If you do not specify test parameters, default values are used.
To use a parameter, specify the parameter name, a space, and the numeric
value. For example, you could specify the following parameter:
−perf_min 512
You can use the following scaling factors:
• 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, and −perf_min 10K causes
transfers to be done in sizes of 10,240 bytes.
You can specify one or more of the following parameters:
−debug
Specifies the level of diagnostic output to be
produced. The greater the number specified, the
more output is produced describing the exerciser
Using the System Exercise Tools F–9