Can't mount any BTRFS filesystem

[przemub]

Hi,

I'm unable to mount any BTRFS filesystem. I get "General system error" when trying to mount them via Tracker and "mount: No such file or directory" when trying via the command line. I get the following error in the syslog:

KERN: ahci: sg_memcpy phyAddr 0x9f35680, size 8
KERN: btrfs: Find() unmapped block 0
Last message repeated 1 time
KERN: btrfs: Volume::Mount(): Couldn't find extent root
KERN: btrfs: Failed mounting the volume. Error: No such file or directory

[przemub]

hrev51671.

[waddlesplash]

A full syslog would be helpful.

[hyche]

Can you provide the outputs of the two following commands with argument is your device ? (run as root if neccessary)

btrfs-show-super -f your_device
btrfs-debug-tree your_device

if your linux system doesn't provide it by default, you can download it or compile it from ​here

The new version of btrfs tools just change the command lines, so you can try it with these

btrfs inspect-internal dump-super -f your_device
btrfs inspect-internal dump-tree your_device

[przemub]

I'll upload tree dumps to another server and link them later, because they take a lot of disk space. I have one more partition (sda3) - trying to mount it crashes the system - ​https://i.imgur.com/rON897U.jpg Should I report it as a separate issue or provide outputs for this partition too?

[hyche]

Replying to Przemysław Buczkowski:

I'll upload tree dumps to another server and link them later, because they take a lot of disk space.

If it takes too large, you can truncate part of it or only print the info of root tree and chunk tree (btrfs-debug-tree -t1 your_device, and -t3)

I have one more partition (sda3) - trying to mount it crashes the system - ​https://i.imgur.com/rON897U.jpg Should I report it as a separate issue or provide outputs for this partition too?

I think make it as a separate issue is better because this is different cause.

[przemub]

Okay, I have added these.

[kallisti5]

mounting works now for me. Could you try again with a recent version?