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block-dm-raid-diagnosis

Diagnose block device, Device-Mapper, RAID, LVM, and multipath configurations.

3|2|Updated Apr 24, 2026
Search Tags:#troubleshooting#diagnostics#linux#storage#io#raid#lvm
One-click install
npx skills add https://github.com/openeuler-mirror/witty-diagnosis-agent --skill block-dm-raid-diagnosis
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: block-dm-raid-diagnosis
Source: https://github.com/openeuler-mirror/witty-diagnosis-agent/tree/main/skills/block-dm-raid-diagnosis
Command: npx skills add https://github.com/openeuler-mirror/witty-diagnosis-agent --skill block-dm-raid-diagnosis

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires ansible, and includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill provides a systematic, non-destructive diagnostic framework for complex storage stack issues, including block device IO bottlenecks, Device-Mapper errors, RAID degradation, and LVM/multipath failures.

Core Features & Use Cases

  • Three-Stack Analysis: Automatically drills down through the block layer, DM/MD mapping stack, and physical device layer to isolate root causes.
  • Expert-Guided Troubleshooting: Implements a rigorous, read-only diagnostic workflow that prevents accidental data loss while providing actionable repair recommendations.
  • Use Case: When a production server reports high IO wait times or filesystem read-only errors, this Skill identifies whether the issue stems from a failing physical disk, a degraded RAID array, or a misconfigured IO scheduler.

Quick Start

Use the block-dm-raid-diagnosis skill to analyze the storage stack for device sdb after a reported IO error.

Frequently Asked Questions about block-dm-raid-diagnosis

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I diagnose high IO wait times and filesystem read-only errors in Linux?▼

Diagnose high IO wait times by performing a three-stack block layer, Device-Mapper, and physical device analysis to isolate whether the bottleneck stems from failing hardware or a misconfigured IO scheduler.

What is the best way to troubleshoot Device-Mapper and LVM mapping inconsistencies?▼

Troubleshoot Device-Mapper and LVM mapping inconsistencies by drilling down through the DM/MD mapping stack and logical volume status to identify misconfigurations and resolve IO bottlenecks non-destructively.

Can I use a read-only diagnostic workflow to identify software RAID degradation without risking data loss?▼

Yes, you can safely identify software RAID degradation using a rigorous read-only diagnostic workflow that prevents accidental data loss while providing actionable repair recommendations.

Does this Linux storage diagnostics approach require Ansible to run?▼

Yes, this Linux storage diagnostics approach requires Ansible as a dependency to automate the comprehensive analysis of block devices, multipath configurations, and software RAID stacks.

How do I isolate whether a storage IO bottleneck originates from physical hardware or logical volume configurations?▼

Isolate storage IO bottlenecks by correlating kernel-level IO errors with physical hardware health and logical volume status through a layered analysis across the block layer and DM stack.

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