sadp(1M)

NAME

sadp − disk access profiler

SYNOPSIS

sadp [ −th ] [ −d [drive] ] s [ n ]

DESCRIPTION

sadp reports disk access location and seek distance, in tabular or histogram form. The statistics are gathered for an interval of s seconds. This is done repeatedly if n is specified. Cylinder usage and disk distance are recorded in units of 8 cylinders.

Drive specifies the disk drives and it may be:

a drive number
two numbers separated by a minus (indicating an inclusive range),

a list of drive numbers separated by commas.

Up to 64 disk drives may be reported.

The −t flag causes the data to be reported in tabular form. The −h flag produces a histogram on the printer of the data. Default is −t.

EXAMPLES

The command:

sadp −d 0 900 4

will generate 4 tabular reports, each describing cylinder usage and seek distance of disk drive 0 during a 15-minute interval.
The command:

sadp −h 60

will generate 1 histogram report, describing cylinder usage and seek distance of all drives during a 1-minute interval.

FILES

/dev/kmem