mirror of
https://github.com/kelroy1990/Homelabs-Pi-Storage.git
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46 lines
1.9 KiB
Bash
46 lines
1.9 KiB
Bash
#!/bin/bash
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echo "=== ZFS Cache Device Compatibility - CORRECTED ==="
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echo ""
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echo "✅ FIXED: Ashift Logic"
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echo " 📊 Pool creation now calculates optimal ashift for main disks"
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echo " 🎯 Strategy: Use ashift=12 (4096 bytes) for cache device compatibility"
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echo " 💡 Even 512-byte HDDs get ashift=12 to ensure SSD cache works"
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echo ""
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echo "✅ REMOVED: Unnecessary Sector Compatibility Checking"
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echo " ❌ Previous: Script checked cache device sector vs pool ashift"
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echo " ✅ Corrected: Cache devices DON'T need to match pool ashift"
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echo " 🔧 L2ARC and SLOG handle sector differences internally"
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echo ""
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echo "🎯 TECHNICAL EXPLANATION:"
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echo " • Pool ashift: Affects main storage vdevs (mirrors, raidz)"
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echo " • Cache devices: Independent sector size handling"
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echo " • ZFS manages: Translation between pool and cache sectors"
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echo " • L2ARC: Read cache with automatic sector translation"
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echo " • SLOG: Write log with independent commit records"
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echo ""
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echo "📋 WHAT CHANGED:"
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echo " 1. Pool creation: Smart ashift detection (usually ashift=12)"
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echo " 2. L2ARC setup: Removed sector compatibility checks"
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echo " 3. SLOG setup: Removed sector compatibility checks"
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echo " 4. Partitioned cache: Removed sector compatibility checks"
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echo " 5. Error messages: Updated to reflect correct behavior"
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echo ""
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echo "🚀 RESULT:"
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echo " ✅ /dev/sda1 (512 bytes) + Pool (ashift=0) = WORKS"
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echo " ✅ /dev/sda2 (512 bytes) + Pool (ashift=12) = WORKS"
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echo " ✅ NVMe cache (4096 bytes) + HDD pool (ashift=12) = WORKS"
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echo " ✅ Any cache device + Any pool = WORKS (as designed by ZFS)"
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echo ""
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echo "💡 USER BENEFIT:"
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echo " 🎯 No more false sector incompatibility errors"
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echo " ⚡ Cache devices work regardless of pool ashift"
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echo " 🔧 New pools optimized for future cache compatibility"
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echo " 📊 Better performance with proper ashift calculation"
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