BackPak H4.00 Troubleshooting and Messages Manual

Troubleshooting
18 BackPak H4.00 Troubleshooting & Messages
Error 190 on a NonStop virtual tape drive
This is the most frequent error reported by the HP tape system at installation time as
reply to the SCF START TAPE $xxx command, it can also happen later in regular
operations.
This has a number of possible causes, but in general it means a failure to establish
correct communications with the tape emulator in the VTC over the FC or SCSI
connection.
For any connection:
• VTC Emulator (FC or SCSI) Service on the VTC Server has not been started
(check in the Windows Services Manager);
• As mentioned in various connections below, the cause of error 190 can be a
cable connected to a wrong port. The BackPak GUI Configuration, VTC page
can be used to automate the matching between the SCF definitions and the
VTC internal configuration, especially with FC connections that provide WWN
to matches the host and VTC ports.
IMPORTANT: When disconnecting and reconnecting SCSI cables, the VTC should be
powered down, AND before each action all virtual tape devices should be STOPPED
and DELETED in SCF, then re-ADDED and STARTED after completion of the action.
For FCSA/VIO connections:
• Incorrect LOCATION (NSK port) PORTNAME (LUN) specified in the SCF ADD
command;
• Optical cable is plugged into the wrong port on the VTC Server or the
NonStop system (this can be easy to do, particularly if cables have not been
labelled at both ends before being laid under a raised floor);
• Optical connector is not fully seated in the receptacle on the VTC Server or
the NonStop system (The connector should be securely snapped in to the
transceiver socket and not move if wiggled);
• The cable's Transmit/Receive optical conductors are crossed over (reversed)
in one of the connectors. Ensure that transmitting light beam emitted by the
ATTO port isn't connected with the NonStop transmitting port;
• Optical cable is bad (try substituting a known good cable if possible.)
For CLIM connections:
• Incorrect CLIM name or CLIM logical LUN number is specified in the SCF ADD
command.
Note the procedure for mapping the LUNs in the CLIM will have already
confirmed that a connection is functional.
For SCSI connections:
• Incorrect LOCATION (NSK port) or DEVICEID (SCSI Target address) specified
in the SCF ADD command;
• SCSI cable plugged into the wrong port on the BackBox or the NonStop
system (this can be easy to do, particularly if cables have not been labelled at
both ends before being laid under a raised floor);