Folks,

Has anyone ever come across the following?

My customer has a NetBackup DataCenter 3.4 installation + SSO with a UNIX (Sun 
Solaris 2.6) Master
Server and a number of UNIX (Sun Solaris 2.6) and Windows (2000 SP3) Media/SAN 
Media Servers.  The
Windows Servers share access to 4 x LTO-1 drives in an ADIC Scalar 1000 via 2 x 
Chaparral FC-SCSI
routers and 1 x Brocade 2800 switch using QLogic 2300 HBAs.  The tape driver is 
the Veritas HalfInch driver.

Periodically, one or more tape drives disappear from one or more of the Windows 
Servers and we have to reboot
to recover.  We have checked out the SSO configuration to Veritas' satisfaction 
and confirmed firmware versions
with ADIC, Chaparral, Brocade and QLogic.  We have even had a debug driver from 
QLogic and captured the event
but their firmware and driver don't detect any error.  Microsoft say the OS 
detects a device error but usually the
same device is seen by all the other servers.  We applied 3.4 patch 4 and 
enabled SCSI Reserve-Release recently
but that had no obvious impact as issue persists.    

I can't honestly see how issues with NetBackup could cause the OS to loose 
access to a physical device but
wondered if something in the SSO might be contributing?

Regards,

Paul Esson
Senior Support Engineer
Redstor Limited


"Delivering Value by Reducing the 
Cost of Storing and Managing Data"

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