dskx man page on Ultrix

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dskx(8)								       dskx(8)

Name
       dskx - generic disk exerciser

Syntax
       /usr/field/dskx [ options ] -rdev
       /usr/field/dskx [ options ] -pdevpart
       /usr/field/dskx [ options ] -cdev

Description
       The  exerciser tests the disk drives on your system.  The exerciser has
       three main options which include read only, write/read/validate data on
       a partition, and write/read/validate data of a disk.

       The  exerciser  does  random  seeks and reads of random block sizes and
       random seeks, writes, reads, and validations of random data patterns of
       random  block  sizes.  The  exerciser will run until or kill -15 pid is
       sent to the process.

       A logfile is made in for you to examine and then remove. If  there  are
       errors  in  the	logfile, make sure you check the file, because that is
       where the driver and kernel error messages are saved.

       CAUTION: Both the -c and -p options of the exerciser  destroy  data  on
       the  disk.   Use	 extreme  caution before using them on any non-scratch
       media.  If you are unsure of what data is on  the  disk,	 contact  your
       system manager before running with either of these options.

Arguments
       One of the following function flags and arguments must be specified.

       -rdev	 Performs a random read-only test on all partitions except the
		 c partition.  The dev argument	 can  be  a  raw  or  buffered
		 device name and number.  For example, rhp0, ra3, hk1.

       -pdevpart Writes,  reads,  and  validates data from the device name and
		 number specified by dev and the partition specified by	 part.
		 The  dev  argument  can  be a raw or buffered device name and
		 number.  For example, rhp0, ra3, hk1.	The part argument  can
		 be any valid partition from a - h.

		 CAUTION:   Be careful when exercising partitions that overlap
		 other partitions, as you may inadvertently destroy data on  a
		 partition  that  you do not want to test.  You can use the -q
		 option of the command to see what partitions overlap  on  the
		 device on your system.

       -cdev	 Writes,  reads, and validates data from all partitions except
		 the c partition on the device	specified  by  dev.   The  dev
		 argument  can	be  a  raw or buffered device name and number.
		 For example, rhp0, ra3, hk1.

Options
       The options are:

       -h	 Prints help message for the command.

       -ofile	 Saves output diagnostics in file.

       -tn	 Specifies the run time in minutes (n).	 The default is to run
		 until the process receives a or kill -15 pid.

       -dm	 Prints statistics every m minutes.

Restrictions
       If  there  is a need to run a system exerciser over an NFS link or on a
       diskless system there are some restrictions.  For exercisers that  need
       to  write  into	a  file system, such as the target file system must be
       writable by root.  Also the directory, in which any of  the  exercisers
       are  executed,  must  be	 writable  by root because temporary files are
       written into the current	 directory.   These  latter  restrictions  are
       sometimes  difficult  to	 overcome  because  often NFS file systems are
       mounted in a way that prevents root from writing into  them.   Some  of
       the  restrictions  may  be overcome by copying the exerciser to another
       directory and then executing it.

Examples
       The following example exercises RA disk unit 1, for 60 minutes  in  the
       background:
       % /usr/field/dskx -t60 -cra1 &
       The  following example exercises raw HP disk unit 0, partition d, until
       or kill -15 pid:
       % /usr/field/dskx -prhp0d

See Also
       Guide to System Exercisers

								       dskx(8)
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