Hardware failure (disk errors, bad RAM) corrupting data pages. Improper server shutdown during a write operation. Bug in PostgreSQL or an extension leading to on-disk corruption. Storage-level snapshot/backup restored incorrectly

Step 1: DO NOT restart the server without taking a filesystem snapshot first.. Step 2: Check server logs for the corrupt relation and page number.. Step 3: Run `pg_dump` to extract still-readable data before attempting repair.. Step 4: Restore from the most recent clean backup.. Step 5: Use `zero_damaged_pages = on` as a last resort to skip corrupted pages (causes data loss).

Critical severityconfiguration

Power BI Refresh Error:
XX001

What does this error mean?

PostgreSQL detected corruption in its internal data files — this is a critical error requiring immediate attention.

Common causes

1Hardware failure (disk errors, bad RAM) corrupting data pages
2Improper server shutdown during a write operation
3Bug in PostgreSQL or an extension leading to on-disk corruption
4Storage-level snapshot/backup restored incorrectly

How to fix it

1Step 1: DO NOT restart the server without taking a filesystem snapshot first.
2Step 2: Check server logs for the corrupt relation and page number.
3Step 3: Run `pg_dump` to extract still-readable data before attempting repair.
4Step 4: Restore from the most recent clean backup.
5Step 5: Use `zero_damaged_pages = on` as a last resort to skip corrupted pages (causes data loss).

Frequently asked questions

How do I prevent XX001 errors in automated pipelines?

Add retry logic with exponential backoff, validate data quality before loading, and monitor pipeline failures in MetricSign to catch this error early.

Official documentation: https://www.postgresql.org/docs/current/errcodes-appendix.html