NAME

sadp − disk access profiler

SYNOPSIS

/usr/sbin/sadp [-th] [-d device[-drive]] interval [count]

DESCRIPTION

sadp reports disk access location and seek distance, in tabular or histogram form, or both.  It samples disk activity once every second during an interval of interval seconds.  This is done count times if count 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 specified device.  The following are valid values for device are:

disc1 HP-IB disks (CS/80). 

disc2 Fiber Link (FL) disk. 

disc3 Small Computer Systems Interface (SCSI) disk. 

sdisk SCSI disks. 

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 one of the following:

• The instance number of the interface card to which device is configured, as reported by the ioscan command (see ioscan(1M)).

• Two instance numbers separated by a minus (indicating an inclusive range). 

• A list of instance numbers separated by commas. 

If -drive is specified, it must follow device without a space (see EXAMPLES).  If -drive is not specified, sadp profiles all the disk drives configured for device. The instance number can be in the range 0 to 255 for disc1, disc2, disc3, and sdisk device drivers. 

EXAMPLES

Generate four tabular reports, each describing cylinder usage and seek distance of disc1, the device driver for disk drive at instance 0, during a fifteen-minute interval:

sadp -d disc1-0 900 4

SEE ALSO

ioscan(1M), kmem(7), mem(7). 

STANDARDS CONFORMANCE

sadp: SVID2

Hewlett-Packard Company  —  HP-UX Release 10.20:  July 1996