Initial commit: combine nas_tool, nas_webdav, sync-utils

find_system_data_usage.sh

@@ -0,0 +1,129 @@
+#!/bin/bash
+
+# Find What's in System Data (351GB)
+# System Data includes snapshots, caches, logs, VM files, etc.
+
+set -e
+
+echo "=== Find System Data Usage (351GB) ==="
+echo ""
+echo "System Data on macOS includes:"
+echo "  - APFS snapshots"
+echo "  - Time Machine local snapshots"
+echo "  - Virtual memory swap files"
+echo "  - System caches"
+echo "  - Log files"
+echo "  - Purgeable space"
+echo ""
+
+TOTAL_FOUND=0
+
+echo "🔍 Checking System Data Components:"
+echo ""
+
+# 1. Check APFS snapshots
+echo "1. APFS Snapshots:"
+APFS_SNAPS=$(diskutil apfs listSnapshots / 2>/dev/null | grep -c "Name:" || echo "0")
+echo "   Found: $APFS_SNAPS snapshot(s)"
+if [ "$APFS_SNAPS" -gt 0 ]; then
+    diskutil apfs listSnapshots / 2>/dev/null | grep -E "Name|Purgeable" | head -4 | sed 's/^/     /'
+fi
+echo ""
+
+# 2. Check Time Machine local snapshots
+echo "2. Time Machine Local Snapshots:"
+TM_SNAPS=$(tmutil listlocalsnapshots / 2>/dev/null | grep -v "Snapshots for disk" | grep -v "^$" | wc -l | tr -d ' ')
+echo "   Found: $TM_SNAPS snapshot(s)"
+if [ "$TM_SNAPS" -gt 0 ]; then
+    tmutil listlocalsnapshots / 2>/dev/null | grep -v "Snapshots for disk" | grep -v "^$" | sed 's/^/     - /'
+fi
+echo ""
+
+# 3. Check virtual memory (swap files)
+echo "3. Virtual Memory (Swap Files):"
+VM_SIZE=$(sudo du -sh /private/var/vm 2>/dev/null | awk '{print $1}' || echo "0")
+echo "   /private/var/vm: $VM_SIZE"
+echo ""
+
+# 4. Check system caches
+echo "4. System Caches:"
+CACHE_SIZE=$(sudo du -sh /private/var/folders 2>/dev/null | awk '{print $1}' || echo "0")
+echo "   /private/var/folders: $CACHE_SIZE"
+echo ""
+
+# 5. Check logs
+echo "5. System Logs:"
+LOG_SIZE=$(sudo du -sh /Library/Logs /private/var/log 2>/dev/null 2>/dev/null | awk '{sum+=$1} END {print sum}' || echo "0")
+echo "   Logs: ~$LOG_SIZE"
+echo ""
+
+# 6. Check MobileBackups
+echo "6. MobileBackups (APFS Local Snapshots):"
+MB_SIZE=$(sudo du -sh /System/Volumes/Data/.MobileBackups /.MobileBackups 2>/dev/null | awk '{sum+=$1} END {print sum}' || echo "0")
+if [ "$MB_SIZE" != "0" ] && [ -n "$MB_SIZE" ]; then
+    echo "   MobileBackups: $MB_SIZE"
+else
+    echo "   MobileBackups: Not found or empty"
+fi
+echo ""
+
+# 7. Check /private/var
+echo "7. /private/var (System Data):"
+PVAR_SIZE=$(sudo du -sh /System/Volumes/Data/private/var 2>/dev/null | awk '{print $1}' || echo "0")
+echo "   /private/var: $PVAR_SIZE"
+echo ""
+
+# 8. Check for sparse bundles
+echo "8. Sparse Bundles (Disk Images):"
+SPARSE_COUNT=$(sudo find /System/Volumes/Data -maxdepth 3 -name "*.sparsebundle" -o -name "*.sparseimage" 2>/dev/null | wc -l | tr -d ' ')
+echo "   Found: $SPARSE_COUNT sparse bundle(s)"
+if [ "$SPARSE_COUNT" -gt 0 ]; then
+    sudo find /System/Volumes/Data -maxdepth 3 -name "*.sparsebundle" -o -name "*.sparseimage" 2>/dev/null | head -5 | while read bundle; do
+        SIZE=$(sudo du -sh "$bundle" 2>/dev/null | awk '{print $1}')
+        echo "     - $bundle ($SIZE)"
+    done
+fi
+echo ""
+
+# 9. Check Library
+echo "9. System Library:"
+LIB_SIZE=$(sudo du -sh /System/Volumes/Data/Library 2>/dev/null | awk '{print $1}' || echo "0")
+echo "   /Library: $LIB_SIZE"
+echo ""
+
+echo "=== Summary ==="
+echo ""
+echo "System Data is 351GB. The components above may not add up to 351GB"
+echo "because System Data also includes:"
+echo "  - Purgeable space (not shown in du)"
+echo "  - APFS snapshot overhead"
+echo "  - Reserved space"
+echo "  - Other system files"
+echo ""
+
+echo "🔧 To Reduce System Data:"
+echo ""
+echo "1. Delete Time Machine local snapshots:"
+if [ "$TM_SNAPS" -gt 0 ]; then
+    echo "   sudo tmutil deletelocalsnapshots <date>"
+else
+    echo "   (No snapshots found)"
+fi
+echo ""
+
+echo "2. Thin local snapshots:"
+echo "   sudo tmutil thinlocalsnapshots / 1000000000 1"
+echo ""
+
+echo "3. Remove Time Machine destination (prevents new snapshots):"
+echo "   System Settings → Time Machine → Remove backup disk"
+echo ""
+
+echo "4. Clean system caches:"
+echo "   sudo rm -rf /private/var/folders/*"
+echo "   (⚠️  Be careful - this may affect running apps)"
+echo ""
+
+echo "5. Restart your Mac:"
+echo "   This often releases purgeable space and snapshots"
+echo ""