🟠 High   ⏱ 5–30 min  Last verified: 18 May 2026
Affected versions: Windows Server 2019

📖 ~1 min read

Table of contents
  1. Symptom & Impact
  2. Environment & Reproduction
  3. Root Cause Analysis
  4. Quick Triage
  5. Step-by-Step Diagnosis
  6. Solution – Primary Fix
  7. Solution – Alternative Approaches
  8. Verification & Acceptance Criteria
  9. Rollback Plan
  10. Prevention & Hardening
  11. Related Errors & Cross-Refs
  12. References & Further Reading

Symptom & Impact

Replication pauses or degrades when log disks fill, increasing data loss exposure.

Environment & Reproduction

Triggered by sustained write bursts that exceed planned log capacity.

Get-SRGroup
Get-Volume -DriveLetter L

Root Cause Analysis

Configured log size is too small for write churn and link latency profile.

Quick Triage

Measure free space and replication lag before modifying group settings.

Get-Volume -DriveLetter L | Select SizeRemaining,Size
Get-SRPartnership

Step-by-Step Diagnosis

Correlate log growth with application write windows and bandwidth dips.

Get-Counter 'LogicalDisk(L:)% Free Space'
Get-Counter 'Network Interface(*)Output Queue Length'
Illustrative mockup for windows-server-2019 — terminal_or_powershell
Log volume capacity and churn analysis — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Increase log allocation and rebalance peak write workload.

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Set-SRGroup -Name  -LogSizeInBytes 128GB
Set-SRGroup -Name  -LogSizeInBytes 128GB
Illustrative mockup for windows-server-2019 — event_or_log_viewer
Post-remediation log stability events — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Move highly bursty data to a separate SR group with dedicated log media.

Verification & Acceptance Criteria

Log free space remains above operational threshold under peak writes.

Rollback Plan

Revert log sizing to previous values if storage pressure impacts other critical services.

Prevention & Hardening

Baseline write amplification and enforce proactive log utilization alerts.

Often appears with backlog spikes and reduced WAN throughput periods.

Related tutorial: View the step-by-step tutorial for Windows Server 2019.

View all Windows Server 2019 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Microsoft Learn: Storage Replica log sizing and performance tuning.

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