сервер подвисает CentOS release 5.5 (Final)

[root@monit scripts]# uptime
 16:23:02 up 168 days,  4:38,  1 user,  load average: 9.63, 8.67, 7.40
[root@monit scripts]# uptime
 16:50:19 up 168 days,  5:05,  1 user,  load average: 7.89, 7.43, 7.38

Apr  5 09:15:27 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 09:45:27 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 09:45:27 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 10:15:27 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 10:15:27 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 10:45:27 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 10:45:27 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 11:15:27 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 11:15:27 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 11:45:28 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 11:45:28 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 12:15:27 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 12:15:27 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 12:45:27 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 12:45:27 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 13:15:29 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 13:15:29 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 13:45:30 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 13:45:30 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 14:15:29 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 14:15:29 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 14:45:29 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 14:45:29 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 15:15:29 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 15:15:29 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors
Apr  5 15:45:29 monit smartd[3286]: Device: /dev/sdc, 1 Currently unreadable (pending) sectors
Apr  5 15:45:29 monit smartd[3286]: Device: /dev/sdc, 1 Offline uncorrectable sectors

Tasks: 251 total,   1 running, 250 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.0%us,  0.1%sy,  0.0%ni, 62.3%id, 37.2%wa,  0.0%hi,  0.4%si,  0.0%st
Mem:  10222700k total, 10051324k used,   171376k free,    44796k buffers
Swap:  4192956k total,     8896k used,  4184060k free,  9080208k cached
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  771 root      10  -5     0    0    0 D  0.3  0.0 286:04.01 kmirrord
    1 root      15   0 10348  624  532 S  0.0  0.0   0:12.61 init
    2 root      RT  -5     0    0    0 S  0.0  0.0   0:00.95 migration/0
    3 root      34  19     0    0    0 S  0.0  0.0   0:00.08 ksoftirqd/0
    4 root      RT  -5     0    0    0 S  0.0  0.0   0:00.00 watchdog/0
    5 root      RT  -5     0    0    0 S  0.0  0.0   0:00.60 migration/1