Arch Linux

shoelesshunter

Member

From: USA

Registered: 2014-05-18

Posts: 289

dmesg reports btrfs corruption

I have a btrfs on a luks container. data=single metadata=dup.

my last scrub reported no errors. however, when I checked dmesg (just being curious) I get this:

sudo dmesg | grep -i btrfs

[    6.179012] Btrfs loaded, crc32c=crc32c-intel, zoned=yes, fsverity=yes
[   11.236860] BTRFS: device fsid b2a5afa0-8145-426f-bae8-74d26b490486 devid 1 transid 5393826 /dev/dm-0 scanned by systemd-udevd (219)
[   11.311168] BTRFS info (device dm-0): disk space caching is enabled
[   11.311178] BTRFS info (device dm-0): has skinny extents
[   11.323096] BTRFS info (device dm-0): bdev /dev/mapper/cryptssd errs: wr 0, rd 0, flush 0, corrupt 1, gen 0
[   11.773219] BTRFS info (device dm-0): enabling ssd optimizations
[   11.773228] BTRFS info (device dm-0): start tree-log replay
[   16.825817] BTRFS info (device dm-0): checking UUID tree
[   18.255890] BTRFS info (device dm-0: state M): use zstd compression, level 6
[   18.255900] BTRFS info (device dm-0: state M): disk space caching is enabled
[   18.418939] BTRFS info: devid 1 device path /dev/mapper/cryptssd changed to /dev/dm-0 scanned by systemd-udevd (456)
[   18.419764] BTRFS info: devid 1 device path /dev/dm-0 changed to /dev/mapper/cryptssd scanned by systemd-udevd (456)
[  291.016679] BTRFS info (device dm-0): scrub: started on devid 1
[ 1040.455725] BTRFS info (device dm-0): scrub: finished on devid 1 with status: 0

specifically, I am concerned about this line:

[   11.323096] BTRFS info (device dm-0): bdev /dev/mapper/cryptssd errs: wr 0, rd 0, flush 0, corrupt 1, gen 0

why is the kernel reporting corruption?