On 10/15/10 11:48 AM, George Sinclair wrote:
> Francis Swasey wrote:
>> I am running Red Hat Linux (RHEL 4 32-bit and 5 64-bit).
>>
>> I started having this problem with NW 7.4.5.2 and am still having it with NW 
>> 7.5.3.2.
> 
> What does /usr/sbin/inquire show? Does it report your tape library?
> What about /proc/scsi/scsi ?

/usr/sbin/inquire on the networker server shows the tape library, on the 
storage nodes that
have tape drives connected, it shows the connected tape drives.  
/proc/scsi/scsi is the same,
containing the tape robotics on the networker server and the IBM ULTRIUM-TD4 
tape drives on the
storage nodes as appropriate.

> 
> What about /usr/bin/sg_map ? Does it report all the devices, including the 
> robot? Can you run
> 'mt -f /dev/nst#' status for each device?

This is Red Hat and I don't have sg_map -- I'll have to google that one to see 
what it does.
Yes, I can run 'mt -f /dev/nst#' for each of the devices and it works.

> 
> Finally, is it possible that one or more modules required for proper tape 
> functionality is not
> loaded? What does /sbin/lsmod report? Do you see mptbase, mptscsih, st ???

I believe all the proper modules are loaded, or this would be a solid failure 
rather than a
frequent but unpredictable failure.  If I could reliably reproduce this, it 
would be much
easier to diagnose.

> 
> George
>>
>> On 10/14/10 10:21 AM, George Sinclair wrote:
>>> What OS are you running? 
>>
>> I am running Red Hat Linux (RHEL 4 32-bit and RHEL 5 64-bit).
>>
>>
>>> What version of NetWorker?
>>
>> When I first noticed this problem, I was running NW 7.4.5.2 and it is still 
>> here with NW
>> 7.5.3.2.
>>
>>> What is your set up?
>>
>> I have a NetWorker server and eight storage nodes.  The NetWorker server has 
>> the robot of the
>> tape library and the fourteen tape drives are direct attached (no switch) to 
>> the various
>> storage nodes, two storage nodes have one tape drive each, three storage 
>> nodes have two tape
>> drives each, two storage nodes have three tape drives each.
>>
>> The problem hits on almost all the tape drives on both versions of RHEL.  
>> There are no error
>> messages logged in /var/log/messages on the storage node, nor on the tape 
>> library to indicate
>> that any error really happened.
>>
> 
> 

-- 
Frank Swasey                    | http://www.uvm.edu/~fcs
Sr Systems Administrator        | Always remember: You are UNIQUE,
University of Vermont           |    just like everyone else.
  "I am not young enough to know everything." - Oscar Wilde (1854-1900)

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