Are you sure you selected the correct mount point? You can also give it the partition directly
this post was submitted on 04 Aug 2023
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yes I'm sure.
root@archiso /mnt/arch # cat ./etc/fstab
# Static information about the filesystems.
# See fstab(5) for details.
#
# /dev/nvme0n1p2
UUID=145c0d63-05f8-43a2-934b-7583cb5f6100 / btrfs rw,relatime,ssd,discard=async,space_cache=v2,subvolid=256,subvol=/@ 0 0
# /dev/nvme0n1p2
UUID=145c0d63-05f8-43a2-934b-7583cb5f6100 /.snapshots btrfs rw,relatime,ssd,discard=async,space_cache=v2,subvolid=260,subvol=/@.snapshots 0 0
# /dev/nvme0n1p1
UUID=4BF3-12AA /boot vfat rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro 0 2
# /dev/nvme0n1p2
UUID=145c0d63-05f8-43a2-934b-7583cb5f6100 /home btrfs rw,relatime,ssd,discard=async,space_cache=v2,subvolid=257,subvol=/@home 0 0
# /dev/nvme0n1p2
UUID=145c0d63-05f8-43a2-934b-7583cb5f6100 /var/cache/pacman/pkg btrfs rw,relatime,ssd,discard=async,space_cache=v2,subvolid=259,subvol=/@pkg 0 0
# /dev/nvme0n1p2
UUID=145c0d63-05f8-43a2-934b-7583cb5f6100 /var/log btrfs rw,relatime,ssd,discard=async,space_cache=v2,subvolid=258,subvol=/@log 0 0
Could you do an offline btrfs-check? (no --repair!)
root@archiso ~ # lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 673M 1 loop /run/archiso/airootfs
sda 8:0 0 476.9G 0 disk
└─sda1 8:1 0 476.9G 0 part
sdb 8:16 0 119.2G 0 disk
└─sdb1 8:17 0 119.2G 0 part
sdc 8:32 1 14.4G 0 disk
├─sdc1 8:33 1 778M 0 part
└─sdc2 8:34 1 15M 0 part
nvme0n1 259:0 0 931.5G 0 disk
├─nvme0n1p1 259:1 0 511M 0 part
└─nvme0n1p2 259:2 0 931G 0 part
root@archiso ~ # btrfs check /dev/nvme0n1p2
Opening filesystem to check...
Checking filesystem on /dev/nvme0n1p2
UUID: 145c0d63-05f8-43a2-934b-7583cb5f6100
[1/7] checking root items
[2/7] checking extents
[3/7] checking free space tree
[4/7] checking fs roots
[5/7] checking only csums items (without verifying data)
[6/7] checking root refs
[7/7] checking quota groups skipped (not enabled on this FS)
found 514161029120 bytes used, no error found
total csum bytes: 496182240
total tree bytes: 1464221696
total fs tree bytes: 813809664
total extent tree bytes: 57655296
btree space waste bytes: 248053148
file data blocks allocated: 4385471590400
referenced 512920408064
btrfs check /dev/nvme0n1p2 4.15s user 1.66s system 62% cpu 9.316 total
What RAID profile are you using on your filesystem? Checksum failures on RAID1/5/6/10 aren't fatal because the block is read from a different mirror.
RAID? how can I check? I'm not using RAID as far as I know
You'd probably know unless you didn't set it up yourself!
btrfs device usage /mountpoint
Well I never set up any raid on my systems
root@archiso /mnt/arch # btrfs device usage .
/dev/nvme0n1p2, ID: 1
Device size: 931.01GiB
Device slack: 0.00B
Data,single: 520.01GiB
Metadata,DUP: 6.00GiB
System,DUP: 16.00MiB
Unallocated: 404.99GiB