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. 

Options

sadp recognizes the following options and command-line arguments:

-t (default) Report data in tabular form. 

-h Produce a histogram of the data. 

-d device Profile a given device.  Valid values for device are:

disc1 HP-IB disk,

disc2 Fiber Link (FL) disk,

disc3 Small Computer Systems Interface (SCSI) disk. 

sadp can profile only one device type per invocation.  The -d option can be omitted if the system has only one device type. 

-drive Specify the disk drive.  drive can be:

• A driver logic unit number (lu) supported by device,

• Two lu numbers separated by a minus (indicating an inclusive range), or

• A list of driver lu numbers separated by commas. 

If drive is not specified, sadp profiles all the disk drives specified by device. The lu number can be in the range of 0 through 255 for disc1, disc2, and disc3 device drivers. 

EXAMPLES

Generate four tabular reports, each describing cylinder usage and seek distance of disc1 disk drive 0 during a 15-minute interval:

sadp -d disc1-0 900 4

FILES

/usr/lib/sadp executable file on Series 800 systems

/dev/kmem special file containing the image of kernel virtual memory

SEE ALSO

kmem(7), mem(7). 

STANDARDS CONFORMANCE

sadp: SVID2

Hewlett-Packard Company  —  HP-UX Release 9.03: April 1994