[PROBLEM] btrfs: mmcblk0p2 checksum verify failed

[ErickP]

Hi,
I was using Raspbmc and switched to Xbian 1.0 Beta 2 last night. I dumped the .img file with dd to the SD and booted from it.
For about an hour all goes well, then I try to perform any operations on the SD card (update, install, mv, cp something) and the the SD card is remounted read only.

Terminal

[ 13.471196] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0x5DE1
[ 17.106256] init: failsafe main process (454) killed by TERM signal
[ 17.470330] udevd[732]: starting version 175
[ 20.247073] mousedev: PS/2 mouse device common for all mice
[ 21.446950] device label xbian-beta2 devid 1 transid 47 /dev/mmcblk0p2
[ 36.133875] init: wait-for-state (xbmcxbmc-loaded) main process (780) killed by TERM signal
[ 43.505730] init: wait-for-state (zram-swapxbmc-done) main process (427) killed by TERM signal
[ 43.575642] init: xbmc-failed-start main process (459) killed by TERM signal
[ 45.075484] zram: module is from the staging directory, the quality is unknown, you have been warned.
[ 45.102104] zram: Created 4 device(s) ...
[ 45.615636] Adding 63484k swap on /dev/zram0. Priority:20 extents:1 across:63484k SS
[ 46.486324] Adding 251388k swap on /dev/mmcblk0p3. Priority:0 extents:1 across:251388k SS
[ 46.993206] device label xbian-beta2 devid 1 transid 48 /dev/mmcblk0p2
[ 48.279325] device label xbian-beta2 devid 1 transid 48 /dev/mmcblk0p2
[ 1301.112974] device label xbian-beta2 devid 1 transid 74 /dev/mmcblk0p2
[ 1370.701022] device label xbian-beta2 devid 1 transid 77 /dev/mmcblk0p2
[ 1371.517619] device label xbian-beta2 devid 1 transid 78 /dev/mmcblk0p2
[ 1372.946116] device label xbian-beta2 devid 1 transid 79 /dev/mmcblk0p2
[ 1593.320701] btrfs bad tree block start 225039243880169532 73302016
[ 1593.321970] btrfs: mmcblk0p2 checksum verify failed on 73285632 wanted A6F31876 found 110AA0E8 level 0
[ 1593.322051] ------------[ cut here ]------------
[ 1593.322073] WARNING: at fs/btrfs/super.c:254 0xc0154710()
[ 1593.322084] btrfs: Transaction aborted (error -5)
[ 1593.322093] Modules linked in: zram© frandom joydev mousedev rpcsec_gss_krb5
[ 1593.322129] CPU: 0 PID: 7938 Comm: dpkg Tainted: G C 3.10.12+ #61
[ 1593.322138] Backtrace:
[ 1593.322149] Function entered at [<c0011300>] from [<c0011490>]
[ 1593.322158] r6:c0154710 r5:00000009 r4:c7ebfad8 r3:e8fc311a
[ 1593.322173] Function entered at [<c0011478>] from [<c03f7c88>]
[ 1593.322184] Function entered at [<c03f7c68>] from [<c001d5ec>]
[ 1593.322192] Function entered at [<c001d598>] from [<c001d6ac>]
[ 1593.322200] r8:c0405b50 r7:00001586 r6:ce752400 r5:cf4bb000 r4:fffffffb
[ 1593.322200] r3:00000009
[ 1593.322220] Function entered at [<c001d674>] from [<c0154710>]
[ 1593.322227] r3:fffffffb r2:c0443274
[ 1593.322238] Function entered at [<c015466c>] from [<c0169820>]
[ 1593.322245] r8:cf4bb000 r7:cf60daa0 r6:fffffffb r5:00000000 r4:00000000
[ 1593.322262] Function entered at [<c016913c>] from [<c016dd78>]
[ 1593.322272] Function entered at [<c016d4bc>] from [<c0172824>]
[ 1593.322280] Function entered at [<c0172770>] from [<c018659c>]
[ 1593.322289] Function entered at [<c01864d0>] from [<c01867cc>]
[ 1593.322297] Function entered at [<c01867b8>] from [<c019723c>]
[ 1593.322307] Function entered at [<c01971d4>] from [<c00b85e8>]
[ 1593.322367] Function entered at [<c00b855c>] from [<c00bb378>]
[ 1593.322378] r6:c7ebff60 r5:c3d1b6e8 r4:c7ebfee0
[ 1593.322393] Function entered at [<c00babb8>] from [<c00bb7e8>]
[ 1593.322402] Function entered at [<c00bb734>] from [<c00bbe84>]
[ 1593.322410] Function entered at [<c00bbe50>] from [<c00ae134>]
[ 1593.322418] r7:ffffff9c r6:0000000a r5:ce54e000 r4:000200c1
[ 1593.322467] Function entered at [<c00ae048>] from [<c00ae1e8>]
[ 1593.322479] Function entered at [<c00ae1c4>] from [<c000e320>]
[ 1593.322488] ---[ end trace ec721da10c684c5e ]---
[ 1593.322503] BTRFS error (device mmcblk0p2) in __btrfs_free_extent:5510: errno=-5 IO failure
[ 1593.322520] BTRFS info (device mmcblk0p2): forced readonly
[ 1593.322540] BTRFS debug (device mmcblk0p2): run_one_delayed_ref returned -5
[ 1593.322562] BTRFS error (device mmcblk0p2) in btrfs_run_delayed_refs:2630: errno=-5 IO failure
[ 1594.525340] init: Failed to write to log file /var/log/upstart/xbmc.log
xbian@xbian /var/log $

Output from mount command:

Terminal

xbian@xbian /var/log $ mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,noatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,noatime)
udev on /dev type devtmpfs (rw,relatime,size=256k,nr_inodes=31069,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620)
tmpfs on /run type tmpfs (rw,nosuid,noexec,noatime,size=25416k,mode=755)
/dev/mmcblk0p2 on / type btrfs (ro,relatime,compress=lzo,ssd,space_cache,autodefrag)
/dev/mmcblk0p1 on /boot type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,​errors=remount-ro)
/dev/mmcblk0p2 on /home type btrfs (ro,noatime,compress=lzo,ssd,space_cache,autodefrag)
/dev/mmcblk0p2 on /lib/modules type btrfs (ro,noatime,compress=lzo,ssd,space_cache,autodefrag)
/dev/mmcblk0p2 on /xbmc-backup type btrfs (ro,noatime,compress=lzo,ssd,space_cache,autodefrag)

Being somehow new to btrfs can you please let me know how to FSCK/CHECK my SD? check the extents or scan for bad blocks? what i found interesting is that i took the SD out of the pi, reformatted it under windows and ran an extremely long scan for bad sectors. There is a possibility that the SD has gone wrong but as of this moment I only have a 2GB usb around to test.

Thanks for your comments.