Disk Unmountable after 6.1.7 upgrade

[barakthecat]

Hi all, I just upgraded from 6.1.6 to 6.1.7 and when my system came back up, my Disk 3 was listed as Unmountable. The disk shows a green ball and the SMART status gives me a green thumbs up. The settings page says

 

File System Status: Unmountable - No file system (32)

 

I believe the disk had been formatted as BTRFS, though it might have been XFS. I have a current offsite backup of my files (love that Crashplan Docker), and actually the data on Disk 3 is of minimal importance - the Disk is dedicated to a Time Machine share and is excluded from my other shares. As long as I get running again before I have a HD crash on one of my Mac's I am good.

 

Attached is the Diagnostics zip file. Please let me know what to do next. Thanks all!

strongbad-diagnostics-20160206-1800.zip

[JorgeB]

You've got fs corruption on disk3, there's not much forum experience repairing btrfs, you can begin by starting the array in maintenance mode and running:

 

btrfs check --repair /dev/md3

 

With some luck corruption is small and this command is will be enough.

[barakthecat]

Thanks for the help. I ran it three time and got the following message

 

btrfs check --repair /dev/md3

enabling repair mode

Checking filesystem on /dev/md3

UUID: a689b3d7-49ad-4e1f-94e4-73e7766234b8

checking extents

Fixed 0 roots.

checking free space cache

cache and super generation don't match, space cache will be invalidated

checking fs roots

checking csums

checking root refs

found 655325340261 bytes used err is 0

total csum bytes: 639124824

total tree bytes: 861519872

total fs tree bytes: 134070272

total extent tree bytes: 46743552

btree space waste bytes: 61750185

file data blocks allocated: 1926415949824

referenced 639287005184

btrfs-progs v4.1.2

 

When I restarted the array the drive mounted as usual and I don't see any evidence of data loss. I'm thinking of just reformatting the disk to be sure though. It's all backup data on there and now I don't feel I can trust it. Losing my historical backup of 2 laptops isn't even a little deal to me. Any other suggestions?

[JorgeB]

I would change it to xfs.