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1995-03-21
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Tech Note #: 9108
Date: April 11, 1991
Subject: TNA2TAPE Diagnostics Using the /Wx
Parameter
Keywords: DIAGNOSTIC ERROR TAPE TNA2TAPE /W
Network Archivist Version: 1.7 1.8 2.0x
Who Should Read This Tech Note?
-------------------------------
Anyone interested in more detailed diagnostic information from the TNA2TAPE
executable by using the undocumented /Wx parameter.
Introduction
------------
Troubleshooting an existing hardware problem can be difficult. This Tech Note
describes the undocumented TNA2TAPE /Wx parameter. This parameter forces the
Network Archivist to output additional information into the TNA_LOG file. The
detail level of this information can be varied
Usage
-----
The /Wx parameter is available on Network Archivist versions 1.7 and 1.8.
Network Archivist version 1.7 does not have the capability of variable levels
of output detail. Use "/W" only.
For Network Archivist version 1.8 use '/Wx', with x being the detail level
(See below). The /Wx parameter is normally used after a Fatal Tape Error has
occurred.
If a Fatal Tape Error has occurred, perform a second tape operation,
preferably a Selective Export to a new blank tape. The Selective Export (/SX)
is used to eliminate the possibility of the original tape being bad.
Example:
TNA2TAPE /SX /W10 F: \RANDOM\FILES
If the operation completes without any errors, this could indicate either an
intermittent hardware error, or that the original tape caused the error.
Consider making a copy of the TNA_LOG file for future reference.
If a tape error did occur while the /W parameter was invoked, the TNA_LOG log
will contain detailed information that could indicate the exact cause of the
problem. Make a copy of the log and contact a trained reseller or Palindrome
Technical Support for more information.
/Wx Options
-----------
The level of output detail generated by the /Wx option depends on the number
that is used with the /W. Valid detail levels are as follows:
/W0 No SCSI tracing & No BIOS tracing.
/W1 No SCSI tracing & Limited BIOS tracing.
/W2 No SCSI tracing & Full BIOS tracing.
/W4 Limited SCSI tracing & No BIOS tracing.
/W5 Limited SCSI tracing & Limited BIOS tracing.
/W6 Limited SCSI tracing & Full BIOS tracing.
/W8 Full SCSI tracing & No BIOS tracing.
/W9 Full SCSI tracing & Limited BIOS tracing.
/W10 Full SCSI tracing & Full BIOS tracing.
Limited BIOS tracing = Trace the most important BIOS commands.
Full BIOS tracing = Trace ALL BIOS commands.
Limited SCSI tracing = Trace SCSI tape drive commands, but limiting
the amount displayed in the log.
Full SCSI tracing = Trace all SCSI tape drive commands, even shows
some of the data transferred.
The /W6 option is most commonly used by Palindrome Technical Support.
Much of the information that is output to the log is low level debugging
information that needs to be evaluated by either a trained reseller or
Palindrome Technical Support.
NOTE: Generally, the higher the number option selected the larger the
TNA_LOG file. The TNA_LOG file will truncate over about 200K. If an
error occurs near the final portion of a volume, options higher than
/W5 may not show in the file.
Summary
-------
Although the /Wx parameter can be a powerful diagnostic tool, it should not be
run as part of the normal daily backup due to the fact that it can generated
large amounts of data, making the log file quite large.