What you’re seeing
- Backup jobs finish with a yellow warning: "Failed to truncate Microsoft SQL Server transaction logs."
- The SQL Server .ldf log files grow week after week, sometimes larger than the databases themselves.
- Disk space on the SQL server keeps shrinking, and low disk alerts begin to appear.
- The database eventually stops accepting new transactions once the drive is full.
Common causes
Every environment is different, but these are the causes our engineers find most often:
- The account Veeam uses for application-aware processing lacks the SQL permissions needed to truncate logs.
- Another backup tool or a SQL maintenance plan is also managing the logs and conflicts with Veeam.
- A database uses the full recovery model while log processing in the job is set in a way that never clears it.
- The SQL VSS writer is in a failed state, so Veeam cannot complete the log step.
- A newly added database or SQL instance has not been granted access for the backup account.
Why it matters
A warning sounds minor, but runaway transaction logs eventually fill the disk and stop the database, which can take down the accounting, ERP or line-of-business application that depends on it. Recovery from a full log disk under pressure is stressful and risky. It can also mean point-in-time restores are not working as expected, so the business may have less protection for SQL data than it believes.
How AskTechGurus fixes it
Skip the trial and error. A certified engineer works on your actual system, finds the root cause, and fixes it properly.
Tell us what’s happening
Submit a ticket in about two minutes. Paste the error, describe what changed, and pick your tier. No charge to submit.
A certified engineer diagnoses it
A vetted, US-based systems engineer claims your ticket, usually within minutes during business hours, and investigates over a secure remote session you can watch and end at any time.
Fixed and verified with you
The engineer resolves the root cause and confirms with you that it’s working. You don’t just get a workaround, and you get a plain-English summary of what was wrong.
Pay only when it’s resolved
Fixed price from $99, invoiced only after you approve the fix. If it isn’t resolved, you don’t pay.
Frequently asked questions
Are our SQL backups still usable with this warning?
The backups usually still contain the database, but log handling is not working as intended, and point-in-time recovery may not be available. It is worth verifying before you need a restore.
Can you handle this without stopping the database?
In most cases, yes. Our certified US engineers work in a remote secure session and you pay only when the warning is resolved.