Hi all,
I'm a everyday user of btrfs. The system is a laptop with UEFI partition
and the following partition scheme:
# blkid
/dev/sda1: UUID="." TYPE="vfat" PARTUUID="."
/dev/sda2: UUID="." TYPE="swap" PARTUUID="."
/dev/sda3: LABEL="root" UUID="." UUID_SUB="." TYPE="btrfs" PARTUUID="."
/dev/sda4: LABEL="home" UUID="." UUID_SUB="." TYPE="btrfs" PARTUUID="."
The partitions are surely not out of space:
# btrfs fi show
Label: 'root' uuid: c7a773e0-e2be-4482-acdc-dbfa4c13c98c
Total devices 1 FS bytes used 9.98GiB
devid 1 size 74.52GiB used 13.03GiB path /dev/sda3
Label: 'home' uuid: 63f5219f-399a-4cce-be86-a8c7400853bd
Total devices 1 FS bytes used 17.65GiB
devid 1 size 188.87GiB used 25.03GiB path /dev/sda4
When the "root" partition is to be mounted during boot up it fails and I
am dropped on an emergency shell. The dmesg output is:
[ 716.434137] BTRFS info (device sda3): disk space caching is enabled
[ 716.434147] BTRFS info (device sda3): has skinny extents
[ 716.436538] BTRFS info (device sda3): bdev /dev/sda3 errs: wr 0, rd
0, flush 0, corrupt 32, gen 0
[ 716.439182] BTRFS warning (device sda3): sda3 checksum verify failed
on 11185160192 wanted 2670F0AB found FDB2F5BD level 0
[ 716.439195] BTRFS error (device sda3): failed to read block groups:
-5
[ 716.481402] BTRFS: open_ctree failed
The btrfs check /dev/sdc3 output is https://ptpb.pw/nc1d
dmesg output: https://ptpb.pw/G0Wv
The kernel I was running is right before this failure was 4.7.5 (with ck
patchset custom compiled) and there was not any kernel panics - just a
restart. Currently runnign through latest Archlinux liveCD
# uname -a
Linux archiso 4.7.5-1-ARCH #1 SMP PREEMPT Sat Sep 24 13:04:22 CEST 2016
x86_64 GNU/Linux
# btrfs --version
btrfs-progs v4.7.3
As this is the root partition I am not able to access it without a
liveCD. Can I perform any kind of steps to recaclulate checksums?
Thanks
--
Leonidas Spyropoulos
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