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Tech Note #: 9302
Date: February 4, 1993
Subject: Troubleshooting 2031 Errors
Keywords: 2031 error, 811 error, database
integrity error, database
corruption
Network Archivist Version: DOS and NLM Version 2.x
Symptom
When executing a backup, the Network Archivist backup aborts with
a 2031 error followed by an 811 error containing debug
information.
Cause
The Network Archivist generates a 2031 error when a bad link is
encountered in the delete chain of a history database. Typically,
this corruption can be caused by aborted backups resulting from
events such as power failures, reboots, server crashes, dropped
connections, and network errors. File system problems and
hardware faults have also been known to cause database
corruption.
Solution
STEP 1: Obtain a copy of the database repair utility SNAPDEL
from the Palindrome BBS (708-505-3336). The file to download is:
SNAPDEL.ZIP SnapDel for version 2.x
STEP 2: Determine which volume(s) to repair (this is the volume
on which the 2031 error occurs).
STEP 3: Change to the \TNA directory on the target volume and
copy SNAPDEL.EXE to the directory.
STEP 4: Run "SNAPDEL /F\TNA > SNAPDEL.OUT". This will allow the
utility to scan and repair the history database (AV*.PAC files)
of the current volume. All output will be redirected to the
output file name specified (SNAPDEL.OUT) and will be located in
the \TNA directory on the target volume.
If you have installed the Network Archivist in a directory other
than \TNA, substitute that path for "\TNA" in the command given
above.
Repeat STEP 3 and STEP 4 for all volumes needing repair.
The contents of the SNAPDEL.OUT output file will contain header
information lines. If SNAPDEL detects a problem, it will be
repaired and a "REPAIRING DELETE CHAIN" or similar message will
be written to the output file. Consider retaining these logs for
future reference.
SNAPDEL is only intended to repair 2031 database integrity
errors. This utility will not repair other database integrity
errors.
Recurring history database corruptions are not normal. Any
installation experiencing recurring database corruptions should
investigate the cause of these problems.