I/O error when trying access to the XBMC database files

[kraleksandr]

Code:

xbian@xbian ~ $  df -h
Filesystem      Size  Used Avail Use% Mounted on
rootfs          7.5G  1.1G  6.2G  15% /
udev             10M  4.0K   10M   1% /dev
tmpfs           189M  204K  188M   1% /run
/dev/mmcblk0p2  7.5G  1.1G  6.2G  15% /
none            5.0M     0  5.0M   0% /run/lock
none            189M     0  189M   0% /run/shm
none            100M     0  100M   0% /run/user
/dev/mmcblk0p1   34M   13M   22M  37% /boot
/dev/mmcblk0p2  7.5G  1.1G  6.2G  15% /home
/dev/sda1       230G  127G   91G  59% /media/hdd

Code:

xbian@xbian ~ $  cp .xbmc/userdata/Database/* t/
cp: omitting directory `.xbmc/userdata/Database/CDDB'
cp: reading `.xbmc/userdata/Database/MyVideos75.db': Input/output error
cp: failed to extend `t/MyVideos75.db': Input/output error

Trying fsck.btrfs now...

---

Is it serious? On second pass same output.