56c07dbe49
- Removed 40+ broken/messy scripts, moved to old_scripts/ - Created lvm_block_backup.sh - proper block-level LVM snapshot backup - Uses dd for block-level cloning instead of file-level rsync - Successfully tested: 462GB backup in 33 minutes - Creates exact, bootable clone of internal drive to external drive - Proper LVM snapshot management with cleanup - Clear documentation in README_BACKUP.md - Clean, minimal solution that actually works
104 lines
3.6 KiB
Bash
Executable File
104 lines
3.6 KiB
Bash
Executable File
#!/bin/bash
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# Snapshot Migration Preview Script
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# Shows what the snapshot-based migration will do
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set -euo pipefail
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# Colors
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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BLUE='\033[0;34m'
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RED='\033[0;31m'
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NC='\033[0m'
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echo -e "${BLUE}=== Snapshot-Based LVM Migration Preview ===${NC}"
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echo
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echo -e "${GREEN}Current System Status:${NC}"
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echo "✅ Booted from: $(findmnt -n -o SOURCE /)"
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echo "✅ Volume Group: migration-vg"
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echo
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echo -e "${GREEN}Current Logical Volumes:${NC}"
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sudo lvs migration-vg --units g -o lv_name,lv_size,data_percent 2>/dev/null
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echo
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echo -e "${GREEN}Available Space for Snapshots:${NC}"
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free_space=$(sudo vgs --noheadings --units m --nosuffix -o vg_free migration-vg | tr -d ' ' | tr ',' '.')
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if command -v bc >/dev/null 2>&1; then
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snapshot_size_per_lv=$(echo "$free_space * 0.8 / 4" | bc 2>/dev/null | cut -d. -f1)
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else
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snapshot_size_per_lv=$((${free_space%.*} * 80 / 100 / 4))
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fi
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echo "Free space: ${free_space}MB"
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echo "Snapshot size per LV: ${snapshot_size_per_lv}MB"
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if (( snapshot_size_per_lv < 100 )); then
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echo -e "${RED}⚠️ WARNING: Limited space for snapshots!${NC}"
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echo "Consider freeing up space or expanding the volume group"
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else
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echo -e "${GREEN}✅ Sufficient space for snapshots${NC}"
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fi
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echo
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echo -e "${GREEN}Target Drive Analysis:${NC}"
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echo "Internal NVMe (nvme0n1):"
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lsblk /dev/nvme0n1
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echo "Size: $(lsblk -b -n -o SIZE /dev/nvme0n1 | awk '{printf "%.1fGB", $1/1024/1024/1024}')"
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echo
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echo -e "${YELLOW}Snapshot Migration Process:${NC}"
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echo "1. 📸 Create temporary snapshots of ALL logical volumes:"
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echo " • root (${snapshot_size_per_lv}MB snapshot)"
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echo " • home (${snapshot_size_per_lv}MB snapshot)"
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echo " • boot (${snapshot_size_per_lv}MB snapshot)"
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echo " • swap (${snapshot_size_per_lv}MB snapshot)"
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echo
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echo "2. 🔧 Prepare internal drive:"
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echo " • Copy partition table from external M.2"
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echo " • Create LVM physical volume"
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echo " • Create volume group 'internal-vg'"
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echo " • Create logical volumes with exact same sizes"
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echo
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echo "3. 📋 Transfer data using block-level copy:"
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echo " • Use dd to copy each snapshot to internal LV"
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echo " • Process one LV at a time to manage space"
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echo " • Remove each snapshot after successful copy"
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echo
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echo "4. ⚙️ Configure boot:"
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echo " • Update fstab for new volume group"
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echo " • Install GRUB on internal drive"
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echo " • Update initramfs for LVM"
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echo
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echo "5. 🛠️ Setup snapshot tools:"
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echo " • Install lvm-snapshot-manager"
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echo " • Reserve space for future snapshots"
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echo
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echo -e "${RED}⚠️ CRITICAL WARNINGS:${NC}"
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echo "• Internal NVMe will be COMPLETELY WIPED"
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echo "• This creates an EXACT copy including all current data"
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echo "• Process takes 1-3 hours depending on data size"
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echo "• Snapshots use limited available space"
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echo
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echo -e "${GREEN}Advantages of Snapshot Method:${NC}"
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echo "✅ Exact bit-for-bit copy of live system"
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echo "✅ No filesystem corruption risks"
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echo "✅ Can capture running system state"
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echo "✅ Uses LVM native capabilities"
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echo "✅ Block-level transfer (faster than file copy)"
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echo
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echo -e "${GREEN}Post-Migration Capabilities:${NC}"
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echo "• sudo lvm-snapshot-manager create - Create system snapshots"
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echo "• sudo lvm-snapshot-manager list - Show snapshots"
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echo "• sudo lvm-snapshot-manager remove - Clean up snapshots"
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echo "• sudo lvm-snapshot-manager merge - Restore from snapshot"
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echo
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echo -e "${BLUE}Ready to proceed with snapshot migration?${NC}"
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echo "Run: sudo ./snapshot_migrate_to_internal.sh"
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echo
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echo -e "${YELLOW}Estimated time: 1-3 hours${NC}" |