Safe to detlete _backup_ btrfs snapshots?

Hello Everyone,

I have a question regarding the btrfs subvolumes in Garuda. Particularly regarding the 2 "_backup_..."

subvolumes you can see in the following screenshot:

As you can see they use a lot of space, that's why I wanted to know where they come from and if it would be safe to delete them as I am really short on free storage.

Thanks a lot for your help :))

My garuda-inxi:

System:
  Kernel: 5.19.4-zen1-1-zen arch: x86_64 bits: 64 compiler: gcc v: 12.2.0
    parameters: BOOT_IMAGE=/@/boot/vmlinuz-linux-zen
    root=UUID=11f335d4-51ef-4ff9-bb59-fba265d78d4b rw [email protected]
    quiet quiet splash rd.udev.log_priority=3 vt.global_cursor_default=0
    loglevel=3 ibt=off
  Desktop: GNOME v: 42.4 tk: GTK v: 3.24.34 info: docker wm: gnome-shell
    dm: GDM v: 42.0 Distro: Garuda Linux base: Arch Linux
Machine:
  Type: Laptop System: LENOVO product: 80NV v: Lenovo ideapad Y700-15ISK
    serial: <superuser required> Chassis: type: 10 v: Lenovo ideapad Y700-15ISK
    serial: <superuser required>
  Mobo: LENOVO model: Allsparks 5A v: NO DPK serial: <superuser required>
    UEFI-[Legacy]: LENOVO v: CDCN53WW date: 09/19/2016
Battery:
  ID-1: BAT0 charge: 41.9 Wh (94.2%) condition: 44.5/60.0 Wh (74.2%)
    volts: 16.6 min: 14.8 model: SMP L14M4P23 type: Li-ion serial: <filter>
    status: charging
CPU:
  Info: model: Intel Core i5-6300HQ bits: 64 type: MCP arch: Skylake-S
    gen: core 6 built: 2015 process: Intel 14nm family: 6 model-id: 0x5E (94)
    stepping: 3 microcode: 0xF0
  Topology: cpus: 1x cores: 4 smt: <unsupported> cache: L1: 256 KiB
    desc: d-4x32 KiB; i-4x32 KiB L2: 1024 KiB desc: 4x256 KiB L3: 6 MiB
    desc: 1x6 MiB
  Speed (MHz): avg: 1220 high: 1280 min/max: 800/3200 scaling:
    driver: intel_pstate governor: powersave cores: 1: 1200 2: 1200 3: 1200
    4: 1280 bogomips: 18399
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
  Vulnerabilities:
  Type: itlb_multihit status: KVM: VMX disabled
  Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT
    disabled
  Type: mds mitigation: Clear CPU buffers; SMT disabled
  Type: meltdown mitigation: PTI
  Type: mmio_stale_data mitigation: Clear CPU buffers; SMT disabled
  Type: retbleed mitigation: IBRS
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
    prctl
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
    sanitization
  Type: spectre_v2 mitigation: IBRS, IBPB: conditional, RSB filling,
    PBRSB-eIBRS: Not affected
  Type: srbds mitigation: Microcode
  Type: tsx_async_abort mitigation: TSX disabled
Graphics:
  Device-1: Intel HD Graphics 530 vendor: Lenovo driver: i915 v: kernel
    arch: Gen-9 process: Intel 14n built: 2015-16 ports: active: HDMI-A-1,eDP-1
    empty: none bus-ID: 00:02.0 chip-ID: 8086:191b class-ID: 0300
  Device-2: NVIDIA GM107M [GeForce GTX 960M] vendor: Lenovo driver: nvidia
    v: 515.65.01 alternate: nouveau,nvidia_drm non-free: 515.xx+ status: current
    (as of 2022-07) arch: Maxwell code: GMxxx process: TSMC 28nm
    built: 2014-19 pcie: gen: 1 speed: 2.5 GT/s lanes: 16 link-max: gen: 3
    speed: 8 GT/s bus-ID: 01:00.0 chip-ID: 10de:139b class-ID: 0302
  Device-3: Microsoft LifeCam HD-3000 type: USB
    driver: snd-usb-audio,uvcvideo bus-ID: 1-2:3 chip-ID: 045e:0779
    class-ID: 0102
  Device-4: Acer Lenovo EasyCamera type: USB driver: uvcvideo bus-ID: 1-6:4
    chip-ID: 5986:0672 class-ID: 0e02 serial: <filter>
  Display: x11 server: X.Org v: 21.1.4 with: Xwayland v: 22.1.3
    compositor: gnome-shell driver: X: loaded: modesetting
    alternate: fbdev,intel,vesa gpu: i915 display-ID: :0 screens: 1
  Screen-1: 0 s-res: 1920x2160 s-dpi: 96 s-size: 508x572mm (20.00x22.52")
    s-diag: 765mm (30.12")
  Monitor-1: HDMI-A-1 mapped: HDMI-1 pos: primary,top model: LG (GoldStar)
    E2442 built: 2011 res: 1920x1080 hz: 60 dpi: 92 gamma: 1.2
    size: 531x299mm (20.91x11.77") diag: 609mm (24") ratio: 16:9 modes:
    max: 1920x1080 min: 720x400
  Monitor-2: eDP-1 pos: bottom model: LG Display 0x04a7 built: 2015
    res: 1920x1080 hz: 60 dpi: 142 gamma: 1.2 size: 344x194mm (13.54x7.64")
    diag: 395mm (15.5") ratio: 16:9 modes: 1920x1080
  OpenGL: renderer: Mesa Intel HD Graphics 530 (SKL GT2) v: 4.6 Mesa 22.1.7
    direct render: Yes
Audio:
  Device-1: Intel 100 Series/C230 Series Family HD Audio vendor: Lenovo
    driver: snd_hda_intel v: kernel bus-ID: 1-2:3 bus-ID: 00:1f.3
    chip-ID: 045e:0779 chip-ID: 8086:a170 class-ID: 0102 class-ID: 0403
  Device-2: Microsoft LifeCam HD-3000 type: USB
    driver: snd-usb-audio,uvcvideo
  Sound Server-1: ALSA v: k5.19.4-zen1-1-zen running: yes
  Sound Server-2: PulseAudio v: 16.1 running: no
  Sound Server-3: PipeWire v: 0.3.56 running: yes
Network:
  Device-1: Intel Dual Band Wireless-AC 3165 Plus Bluetooth driver: iwlwifi
    v: kernel pcie: gen: 1 speed: 2.5 GT/s lanes: 1 bus-ID: 08:00.0
    chip-ID: 8086:3166 class-ID: 0280
  IF: wlp8s0 state: up mac: <filter>
  Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
    vendor: Lenovo driver: r8169 v: kernel pcie: gen: 1 speed: 2.5 GT/s
    lanes: 1 port: 3000 bus-ID: 09:00.0 chip-ID: 10ec:8168 class-ID: 0200
  IF: enp9s0 state: down mac: <filter>
  IF-ID-1: docker0 state: down mac: <filter>
Bluetooth:
  Device-1: Intel Bluetooth wireless interface type: USB driver: btusb v: 0.8
    bus-ID: 1-11:5 chip-ID: 8087:0a2a class-ID: e001
  Report: bt-adapter ID: hci0 rfk-id: 0 state: down
    bt-service: enabled,running rfk-block: hardware: no software: yes
    address: <filter>
Drives:
  Local Storage: total: 313.45 GiB used: 274.34 GiB (87.5%)
  SMART Message: Required tool smartctl not installed. Check --recommends
  ID-1: /dev/sda maj-min: 8:0 vendor: Crucial model: CT275MX300SSD4
    size: 256.17 GiB block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s
    type: SSD serial: <filter> rev: R040 scheme: MBR
  ID-2: /dev/sdb maj-min: 8:16 type: USB vendor: SanDisk model: Ultra Fit
    size: 57.28 GiB block-size: physical: 512 B logical: 512 B type: N/A
    serial: <filter> rev: 1.00 scheme: MBR
Partition:
  ID-1: / raw-size: 256.17 GiB size: 256.17 GiB (100.00%) used: 244.18 GiB
    (95.3%) fs: btrfs dev: /dev/sda1 maj-min: 8:1
  ID-2: /home raw-size: 256.17 GiB size: 256.17 GiB (100.00%) used: 244.18
    GiB (95.3%) fs: btrfs dev: /dev/sda1 maj-min: 8:1
  ID-3: /var/log raw-size: 256.17 GiB size: 256.17 GiB (100.00%) used: 244.18
    GiB (95.3%) fs: btrfs dev: /dev/sda1 maj-min: 8:1
  ID-4: /var/tmp raw-size: 256.17 GiB size: 256.17 GiB (100.00%) used: 244.18
    GiB (95.3%) fs: btrfs dev: /dev/sda1 maj-min: 8:1
Swap:
  Kernel: swappiness: 133 (default 60) cache-pressure: 100 (default)
  ID-1: swap-1 type: zram size: 15.46 GiB used: 54.2 MiB (0.3%)
    priority: 100 dev: /dev/zram0
Sensors:
  System Temperatures: cpu: 52.0 C mobo: N/A
  Fan Speeds (RPM): N/A
Info:
  Processes: 350 Uptime: 37m wakeups: 2 Memory: 15.46 GiB used: 8.13 GiB
  (52.6%) Init: systemd v: 251 default: graphical tool: systemctl
  Compilers: gcc: 12.2.0 clang: 14.0.6 Packages: 1870 pacman: 1824 lib: 413
  flatpak: 46 Shell: fish v: 3.5.1 default: Bash v: 5.1.16 running-in: tilix
  inxi: 3.3.20
Garuda (2.6.6-1):
  System install date:     2022-05-11
  Last full system update: 2022-08-29
  Is partially upgraded:   No
  Relevant software:       NetworkManager
  Windows dual boot:       <superuser required>
  Snapshots:               Snapper
  Failed units:            [email protected] [email protected] text will be hidden

They are created when you restore a snapshot. You can delete them if you don't need them anymore.

6 Likes

I see, thanks a lot :))

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