Initial commit: combine nas_tool, nas_webdav, sync-utils

force_purge_system_data.sh

@@ -0,0 +1,100 @@
+#!/bin/bash
+
+# Force Purge System Data (351GB)
+# The 351GB is likely "purgeable" space that macOS won't release until forced
+
+set -e
+
+echo "=== Force Purge System Data (351GB) ==="
+echo ""
+echo "The 351GB in System Data is likely PURGEABLE space."
+echo "macOS shows it as 'used' but it's actually available."
+echo "We'll force macOS to release it by creating a large file."
+echo ""
+
+FREE_SPACE_BEFORE=$(df / | tail -1 | awk '{print $4}')
+FREE_SPACE_GB_BEFORE=$(echo "scale=2; $FREE_SPACE_BEFORE / 1024 / 1024" | bc)
+echo "Current free space: ${FREE_SPACE_GB_BEFORE}GB"
+echo ""
+
+echo "🔧 Method: Create a large file to force purge..."
+echo ""
+echo "   This will:"
+echo "   1. Create a 50GB file (forces macOS to purge space)"
+echo "   2. Delete it immediately"
+echo "   3. This should release the purgeable space"
+echo ""
+
+read -p "Proceed? This is safe - file will be deleted immediately. (y/n) " -n 1 -r
+echo ""
+if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+    echo "Cancelled."
+    exit 0
+fi
+
+echo ""
+echo "Creating 50GB test file to force purge..."
+echo "   (This may take a few minutes)"
+echo ""
+
+# Create large file to force purge
+TEST_FILE="$HOME/test_force_purge_$(date +%s).tmp"
+if dd if=/dev/zero of="$TEST_FILE" bs=1g count=50 2>/dev/null; then
+    echo "   ✅ Created 50GB file"
+    echo ""
+    echo "   Checking space after creation..."
+    sleep 2
+    FREE_DURING=$(df / | tail -1 | awk '{print $4}')
+    FREE_DURING_GB=$(echo "scale=2; $FREE_DURING / 1024 / 1024" | bc)
+    echo "   Free space during: ${FREE_DURING_GB}GB"
+    echo ""
+    
+    echo "   Deleting test file..."
+    rm -f "$TEST_FILE"
+    echo "   ✅ Deleted"
+else
+    echo "   ⚠️  Could not create file (not enough space or permission issue)"
+    echo "   This means the purgeable space may not be available"
+fi
+
+echo ""
+echo "⏳ Waiting for system to update..."
+sleep 10
+
+# Check final results
+FREE_SPACE_AFTER=$(df / | tail -1 | awk '{print $4}')
+FREE_SPACE_GB_AFTER=$(echo "scale=2; $FREE_SPACE_AFTER / 1024 / 1024" | bc)
+FREED_GB=$(echo "scale=2; $FREE_SPACE_GB_AFTER - $FREE_SPACE_GB_BEFORE" | bc)
+
+echo ""
+echo "=== Results ==="
+echo "   Before: ${FREE_SPACE_GB_BEFORE}GB free"
+echo "   After:  ${FREE_SPACE_GB_AFTER}GB free"
+if (( $(echo "$FREED_GB > 100" | bc -l) )); then
+    echo "   ✅ Successfully freed: ${FREED_GB}GB!"
+    echo "   The purgeable space was released!"
+elif (( $(echo "$FREED_GB > 0" | bc -l) )); then
+    echo "   ✅ Freed: ${FREED_GB}GB"
+else
+    echo "   ⚠️  No space freed"
+fi
+echo ""
+
+echo "=== Understanding System Data (351GB) ==="
+echo ""
+echo "If System Data still shows 351GB but you have free space,"
+echo "this is NORMAL macOS behavior:"
+echo ""
+echo "  - System Data includes PURGEABLE space"
+echo "  - Purgeable space is AVAILABLE but shown as 'used'"
+echo "  - macOS will release it automatically when needed"
+echo "  - The space is actually available for use"
+echo ""
+echo "To verify space is available:"
+echo "  1. Try creating a large file (you just did)"
+echo "  2. Check Activity Monitor → Disk → Purgeable"
+echo "  3. The space will be released when you actually need it"
+echo ""
+echo "The 351GB in System Data is misleading - much of it"
+echo "is purgeable and available when needed."
+echo ""