Tags
disk usage
Looking at disk usage on any of these must be done using a tool built for it if you want an accurate measurement. General purpose tools like du will be inaccurate as they do not count things like duplicate copies in snapshots.
❯ sudo btrfs fi usage -T /
[sudo] password for waylon:
Overall:
Device size: 465.26GiB
Device allocated: 251.06GiB
Device unallocated: 214.20GiB
Device missing: 0.00B
Device slack: 0.00B
Used: 234.44GiB
Free (estimated): 227.37GiB (min: 120.27GiB)
Free (statfs, df): 227.37GiB
Data ratio: 1.00
Metadata ratio: 2.00
Global reserve: 478.88MiB (used: 0.00B)
Multiple profiles: no
Data Metadata System
Id Path single DUP DUP Unallocated Total Slack
1 /dev/nvme1n1p2 239.00GiB 12.00GiB 64.00MiB 214.20GiB 465.26GiB -
Total 239.00GiB 6.00GiB 32.00MiB 214.20GiB 465.26GiB 0.00B
Used 225.82GiB 4.31GiB 64.00KiB
-T for tabular format
mounting the drive
sudo mkdir /mnt/nvme1n1p2/
sudo mount -o subvol=/ /dev/nvme1n1p2 /mnt/nvme1n1p2
mounting a snapshot
snapper
btdu
sudo btdu /mnt/nvme1n1p2
btdu v0.5.0 @ /mnt/nvme1n1p2
--- / ----------------------------------------------------------------------------------- ~5.974 GiB [ ] /<DUP> ~239.1 GiB [##########] /<SINGLE>
--- Details: ----------------------------------------------------------------------------
- Full path: /mnt/nvme1n1p2/
- Average query duration: 0.0002558 seconds
- Represented size: ~245.0 GiB (607659 samples), ±0.0 B
- Logical offsets: ..., 2659587804610, 2608834997278, 2688762158568
--- Explanation:
Welcome to btdu. You are in the hierarchy root; results will be arranged according to
their block group and profile, and then by path.
Use the arrow keys to navigate, press ? for help.
Samples: 607659 Resolution: ~422.8 KiB