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Conference vaxaxp::vmsnotes

Title:VAX and Alpha VMS
Notice:This is a new VMSnotes, please read note 2.1
Moderator:VAXAXP::BERNARDO
Created:Wed Jan 22 1997
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:703
Total number of notes:3722

175.0. "Device Timeout on CD Services" by CSC32::S_WAHL () Tue Feb 11 1997 14:00

Customer is running 3.2 kernel software on an Infoserver 150 and VAX 6.0.  
Intermittently the customer is experiencing device timeouts on a cd services 
offered by the infoserver.  The strange thing about it is its always the same
reader that is having the problem.  There are seven readers in the cabinet.  
She has replaced this device with two other readers and the same problems 
occur.  Customer has already had HW (outside vendor) check out the 
configuration.  Apparently they say nothing is wrong.  

I still believe there is a HW problem.  The customer is unable to get this 
    device back at all.  It goes into mount verification and then eventually 
    times out.  There is no consistency in the time the device takes to do this.

Could this be an exhausted resource?  Why are none of the other readers 
failing if this was the case?  Any and all help would be appreciated here.
I could not really find anything in STARs that pointed to a problem like
this or a recommended patch.


Thanks,

Susan M. Wahl

                                                               
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175.1UTRTSC::utoras-198-48-93.uto.dec.com::JurVanDerBurgChange mode to Panic!Wed Feb 12 1997 01:198
Could it possible that the infoserver suffers from priority lockouts?
What is the scsi id of the failing device? If a device with unit 0 tries
to get the bus, but all other devices are active as well it may not get a chance 
in time to get to the bus. This is not so likely with only cd's on the bus, but 
it may be a start.

Jur.