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Conference 49.910::kav30

Title:VAX on VMEbus: KAV30
Notice:Could have been as fast as 68K but its a VAX!
Moderator:CSSVMS::KAV30_SUPP
Created:Thu Apr 18 1991
Last Modified:Fri Aug 02 1996
Last Successful Update:Fri Jun 06 1997
Number of topics:159
Total number of notes:645

123.0. "Conflict between SCSI driver and User written onesss" by TRN01::FORMIA () Thu May 05 1994 19:19

    I'm using a Digital I/O driver to handle a Philips board since 1 year;
    this driver has been developed with the contribution of an external
    resource.
    On VME we have other boards working with other drivers; no problem at
    all untill I install a SCSI disk on the KAV30 port.
    What appens is the follow:
    as soon I have to handle an interrupt from the Digital I/O board I
    loose the disk (I get time-out at any operation).
    
    I have been investigated on interrupt vector as the only area where I
    can see relation between VME bus and SCSI device. I tried to change
    vector but I didn't get positive result. Also I don't see errors in the
    ISR. If I set the board and the driver to work in polling mode instead
    of interrupt mode I avoid the problem.
    
    I'm looking for an help to focus my next tests, 
    thanks in advance for support.
    
       Marino Formia     
T.RTitleUserPersonal
Name
DateLines
123.1What's your configuration ?SOLVIT::YAHUDI::SYSTEMThu May 05 1994 23:5424
Hi Marino,

What type of SCSI disk do you have connected to the KAV30 ?

Is it a DEC qualified disk for use with VAXELN - see the VAXELN release notes 
for a valid list.

Also is your system using the standard SCSI drivers, and not a customised
version ?

Also can you provide a detailed description of your VMEBus configuration.

One thing to try is to use a VME tracer (eg VMETRO) to see what is happening on
the VMEBus when you loose the disk drive, ie confirm it is as it should be wrt
to IRQ being generated/received.

If this is a major problem then we can try and simulate this problem in Munich.

Hope this helps.

Regards

John Cushnie@PCS
DEC-PCS, Munich.
123.2please note revision of KAV30...EICMFG::KAV30_SUPPFri May 06 1994 10:018
    Hi,
    the problem sounds somewhat familiar...
    could you please post the version and revision of your KAV30 ?
    e.g. KAV30-xx, Rev Ax or Bx or C01 ?
    Thanks!
    
    Thomas
    
123.3more infosTRN01::FORMIAFri May 06 1994 12:078
    
    many thanks for reply!
    SCSI device is standard RZ25 with related driver
    KAV30-AD T6010-DA.C01 MU34342181 30-35539-04
    Rev. EPROM 23-263E8-00.A01
    
      bye-bye