Problem: VG→Borg was creating temp files for all LVs simultaneously,
causing 'no space left' errors when LVs are large.
Solution: Process LVs sequentially instead of simultaneously:
1. Create snapshot for one LV
2. Stream it directly to Borg (no temp files)
3. Remove snapshot immediately
4. Move to next LV
Changes:
- VG→Borg now creates separate archives per LV instead of one big archive
- Each LV gets its own archive: vg_internal-vg_lv_root_20241009_123456
- No temporary files needed - direct streaming
- Space-efficient: only one snapshot exists at a time
- More robust: failure of one LV doesn't affect others
Benefits:
- No more space issues regardless of LV sizes
- Faster cleanup between LVs
- Individual LV recovery possible
- Better error isolation
- Still preserves block-level backup benefits
BREAKING CHANGE: Borg backups now store raw block devices instead of files
Changes:
- LV→Borg: Stores snapshot as raw block device (.img file) in Borg
- VG→Borg: Stores each LV as separate .img files in Borg repository
- No more file-level mounting - preserves exact block-level state
- Uses dd | borg create --stdin-name for LV backups
- Creates temporary .img files for VG backups
- Maintains all filesystem metadata, boot sectors, etc.
- Better deduplication for similar block patterns
Benefits:
- Exact block-level restoration possible
- Preserves all filesystem metadata
- Better suited for system/boot volume backups
- Still gets Borg's compression, deduplication, encryption
- Clear difference between LV and VG modes
Now LV→Borg and VG→Borg have distinct, useful purposes:
- LV→Borg: Single logical volume as one block device
- VG→Borg: All logical volumes as separate block devices
- Add LV → Borg and VG → Borg backup modes
- GUI: Borg settings panel with repo path, encryption, passphrase
- CLI: Enhanced script with Borg options (--new-repo, --encryption, --passphrase)
- Automatic repository initialization for new repos
- Support for all Borg encryption modes (none, repokey, keyfile)
- Mount snapshots temporarily for file-level Borg backups
- Comprehensive cleanup of snapshots and mount points
- Updated documentation and examples
Benefits:
- Deduplication and compression
- Strong encryption support
- Incremental backups capability
- Space-efficient storage
- Still maintains simple snapshot → backup → cleanup workflow
- Add 3 backup modes: LV→LV, LV→Raw, VG→Raw
- Simple GUI with mode selection and dynamic target lists
- Command-line version with clear mode support
- Enhanced drive listing with mode-specific options
- Minimal logic: just snapshot → copy → cleanup
- No complex migration features that cause system issues
- Supports refreshing existing backups and creating fresh ones
