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CS1000 ITG2003 No Space Left

Jeremy Boilard

Problem Statement

A Nortel CS1000 (CS1K) device reports a Major ITG2003 alarm with Alarm Code ACT and a file I/O error indicating "No space left on device" while opening or writing an OM high-water-mark file.

Impact

The affected CS1000 component may be unable to write operational measurement, log, or alarm-related files. CPU status may remain normal while the alarm persists because the triggering condition is storage-related rather than CPU-related.

Alarm

Major alarm: Nortel CS1000 (CS1K), Maint Object ITG2003, Alarm Code ACT, fileError/File IO error, OM_HighWaterMark file, "No space left on device"

Troubleshooting Steps

  1. Confirm the alarm in the monitoring dashboard and record the device type, alarm severity, maint object ITG2003, Alarm Code ACT, and the file I/O error text.
  2. Verify overall system health. Check that CPUs are normal and look for any additional active alarms that may indicate a broader platform issue.
  3. Access the affected CS1000 or associated management/server component using the approved support method.
  4. Check filesystem capacity and inode usage with standard platform commands such as `df -h` and `df -i`. Focus on the filesystem that contains the referenced Nortel/SPS/OM file location if visible.
  5. Identify large or rapidly growing files with commands such as `du -sh <directory>` and review log, OM, archive, or temporary directories according to local maintenance procedures.
  6. Do not delete active application files. If space must be reclaimed, remove or archive only files confirmed to be safe by the site runbook, vendor guidance, or the responsible voice/platform team.
  7. After reclaiming space, confirm the filesystem is no longer full and that there is sufficient free capacity and inode availability.
  8. Monitor the CS1000 alarm dashboard to confirm the ITG2003 Major alarm clears or changes state.
  9. If the alarm remains active after storage is available, restart only the approved affected service or escalate to the CS1000/vendor support team for file-system or application-level recovery.
  10. Document the storage condition found, actions taken, current CPU status, and final alarm state.

Resolution

Free or restore capacity on the filesystem referenced by the CS1000 ITG2003 file I/O error, then verify that the device can write the OM high-water-mark file and that the Major alarm clears. If disk space is available but the alarm persists, escalate for CS1000 application or filesystem recovery.