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
vax/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),
vax/format(8)
HISTORY
The
drtest command appeared in
4.2BSD.
AUTHORS
Helge Skrivervik