DRTEST(8)

NAME
drtest - stand-alone disk test program

DESCRIPTION
drtest is a stand-alone program used to read a disk track by track. It was primarily intended as a test program for new stand-alone 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 running 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 instead of type(a,u) where X = a*8+u, e.g., hp(1,3) becomes hp11.

SEE ALSO
bad144(8), format(8)

HISTORY
The drtest command appeared in 4.2BSD.

AUTHORS
Helge Skrivervik