DRTEST(8)            OpenBSD System Manager's Manual (VAX)           DRTEST(8)

NAME
     drtest - standalone disk test program

DESCRIPTION
     Drtest is a standalone program used to read a disk track by track.  It
     was primarily intended as a test program for new standalone drivers, but
     has shown useful in other contexts as well, such as verifying disks and
     running speed tests. For example, when a disk has been formatted (by
     format(8)), you can check that hard errors has been taken care of by run-
     ning drtest. No hard errors should be found, but in many cases quite a
     few soft ECC errors will be reported.

     While drtest is running, the cylinder number is printed on the console
     for every 10th cylinder read.

EXAMPLES
     A sample run of drtest is shown below.  In this example (using a 750),
     drtest is loaded from the root file system; usually it will be loaded
     from the machine's console storage device.  Boldface means user input.
     As usual, ``#'' and ``@'' may be used to edit input.

           >>>B/3
           %%
           loading hk(0,0)boot
           Boot
           : hk(0,0)drtest
           Test program for stand-alone up and hp driver

           Debugging level (1=bse, 2=ecc, 3=bse+ecc)?
           Enter disk name [type(adapter,unit), e.g. hp(1,3)]? hp(0,0)
           Device data: #cylinders=1024, #tracks=16, #sectors=32
           Testing hp(0,0), chunk size is 16384 bytes.
           (chunk size is the number of bytes read per disk access)
           Start ...Make sure hp(0,0) is online
            ...
           (errors are reported as they occur)
            ...
           (...program restarts to allow checking other disks)
           (...to abort halt machine with ^P)

DIAGNOSTICS
     The diagnostics are intended to be self explanatory. Note, however, that
     the device number in the diagnostic messages is identified as typeX in-
     stead of type(a,u) where X = a*8+u, e.g., hp(1,3) becomes hp11.

SEE ALSO
     bad144(8), format(8)

AUTHORS
     Helge Skrivervik

HISTORY
     The drtest command appeared in 4.2BSD.

OpenBSD 2.9                     March 16, 1991                               1
