sadp(1M)         SYSTEM ADMINISTRATION COMMANDS          sadp(1M)



NAME
     sadp - disk access profiler

SYNOPSIS
     sadp [ -th ] [ -d device[-drive] ] s [ n ]

DESCRIPTION
     sadp reports disk access  location  and  seek  distance,  in
     tabular  or  histogram  form.  It samples disk activity once
     every second during an interval of s seconds.  This is  done
     n times if n is specified.  Cylinder usage and disk distance
     are recorded in units of 8 cylinders.

     Valid values of device are hdsk for integral disk, sdsk  for
     the  Small  Computer Systems Interface (SCSI) disk, and fdsk
     for integral floppy.  Neither XDC disks nor SCSI Release 1.0
     disks can be profiled using sadp.  sadp can profile only one
     device type per invocation.  The -d option may be omitted if
     the system has only one device type.

     Drive specifies the disk drives and it may be:

          a drive number in the range supported by device,
          two  numbers  separated  by  a  minus  (indicating   an
          inclusive range),
     or
          a list of drive numbers separated by commas.

     Up to 8 disk drives may be reported for device type hdsk  or
     fdsk,  and  up  to  56 for sdsk.  If drive is not specified,
     sadp profiles all the disk drives specified by device, up to
     the maximum of 8 for hdsk and fdsk, or 56 for sdsk.

     The -t flag causes the data to be reported in tabular  form.
     The  -h  flag produces a histogram of the data.  The default
     is -t.

EXAMPLE
     The command:

          sadp -d hdsk-0 900 4

     will generate four tabular reports, each describing cylinder
     usage  and  seek  distance of hdsk disk drive 0 during a 15-
     minute interval.

FILES
     /dev/kmem

SEE ALSO
     mem(7).




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