Installation

sorry about my english

the system works just  fine few days from the beginning..  and than trouble came up!  
i cant save my backup, cant edit rules.. etc but system working..
here few messages from system log

"kernel: ad0: FAILURE - READ status=11<DSC,ERROR> error=4<ABORTED> LBA=144"
"kernel: g_vfs_done():ad0a[READ(offset=65536, length=8192)]error = 5"

and when i trying to save my backup it says

"Warning: filemtime(): Stat failed for /conf/config.xml (errno=2 - No such file or directory) in /etc/inc/config.inc on line 154 Warning: filesize(): Stat failed for /conf/config.xml (errno=2 - No such file or directory) in /usr/local/www/diag_backup.php on line 54 Warning: Cannot modify header information - headers already sent by (output started at /etc/inc/config.inc:154) in /usr/local/www/diag_backup.php on line 55 Warning: Cannot modify header information - headers already sent by (output started at /etc/inc/config.inc:154) in /usr/local/www/diag_backup.php on line 56 Warning: Cannot modify header information - headers already sent by (output started at /etc/inc/config.inc:154) in /usr/local/www/diag_backup.php on line 57 Warning: readfile(/conf/config.xml): failed to open stream: No such file or directory in /usr/local/www/diag_backup.php on line 58 "

i understand that its hard to explain without config,
but i just need the answer is it possible that my HDD  got bad
or its just bugs of beta? (probably thats new feature "Set P2P traffic to lowest priority" in the traffic shaper  bug )

appreciate any responds.. thx

update!
yeah it was it! my too old hdd drive damaged !
thanx for responds lol =)