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Informix Error -43183: Logical logs will not be backed up / salvaged because LTAPEDEV value is <value>.

Cause and resolution

Logical logs will not be backed up / salvaged because LTAPEDEV value is <value>.

If the LTAPEDEV value in your ONCONFIG file is /dev/null on UNIX or NUL on Windows, logical-log backups are not performed. You set these special values to tell the database server and ON-Bar not to perform any logical-log backups. Data in the logical logs cannot be restored.

Set the LTAPEDEV value to something other than /dev/null on UNIX or NUL on Windows or to blank if you want to perform logical-log backups. If you do not want any logical-log backups, you can restore only from whole-system backups, performed with the following command:

onbar -b -w

Also, you must restore with the following command:

onbar -r -w -p

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-43183 fires when LTAPEDEV in ONCONFIG is /dev/null (UNIX) or NUL (Windows) — per the official guidance, these special values tell the server and ON-Bar not to perform logical-log backups, so logical-log data can't be restored.

  1. LTAPEDEV set to /dev/null/NUL, per the official guidance — the direct, only cause.
Solutions / Resolution
  1. Set LTAPEDEV to something other than /dev/null/NUL, or blank, if logical-log backups are wanted, per the official guidance.
  2. If logical-log backups aren't wanted, restore only from whole-system backups, per the official guidance, using onbar -b -w for backup and onbar -r -w -p for restore.
Examples
Whole-system-only backup and restore
$ onbar -b -w
$ onbar -r -w -p
Diagnostic Checks
  1. Check ONCONFIG's LTAPEDEV value, and set it to a real device/file if logical-log backups are needed, or use whole-system-only backup/restore if not.
Related Errors / Related Topics
  • -43189 — "Logical Logs cannot be restored because LTAPEDEV value is ." The restore-side equivalent of this same LTAPEDEV restriction.

LTAPEDEV is set to /dev/null/NUL, disabling logical-log backups — set a real value, or use whole-system-only backup/restore (onbar -b -w / onbar -r -w -p).