On Monday, April 27, 1998 12:41 PM, WirtAtmar wrote:
> Sam Knight asks:
>
> > Does anyone know the meaning of the error message below, it displays each
> >  time a DAT tape is loaded?  The indicator lights are normal (green).  Could
> >  not find the message in the MPE/iX Error Message Manual Vol I, II or III.
> >
> >  AVR Failure on LDEV 7
> >  Status FFD F0071, #23 "AVR6
>
> I must admit that I'm guessing what AVR stands for. I've always taken it to
> mean something like "Automatic Volume Recognition," but to be absolutely
> honest, you can supply your own translation and perhaps be more accurate.
>
> As to what's causing the problem, there too I can only guess, but as I do our
> own maintenance on our DDS drives, I have found that this error commonly
> occurs because of two somewhat distinct problems. The first is that the
> rotating read/write head has a bit of dirt attached to it so that it is
> causing the tape to fly off of the surface of the helical head -- and thus
> incompletely reading the load point prefix data from the tape and therefore
> cannot properly read or recognize the volume data information. The solution
> here is simple: clean the tape head by running a cleaner cartridge through the
> tape once or twice.
>
> The second source of this problem has been the presence of dirt in the path of
> the IR-phototransistor pair that seeks out the black-clear-black load point on
> the tape. Pressurized dry air works well to clear this problem -- but you need
> to remove and disassemble your drive to perform this operation.
>
> Other sources of this problem would be that the read/write electronics in the
> drive have failed, but that is a relatively remote possibility. But if that
> should happen, there's almost nothing you can do to remedy that other than
> call HP.
>
> Wirt Atmar
>
>

Thanks for the information.  Used the cleaning tape on the drive twice, the problem disappeared.

--
Sam Knight                                     Email: [log in to unmask]
Senior Programmer/Analyst                      Phone: (904) 745-7509
Jacksonville University                          Fax: (904) 745-7149
Jacksonville, FL 32211