Zamrznuti systemu - VIA SATA, 200GB HDD

Zdravim,

Mam nasledujici problem s File Serverem - samba.
Cca jednou za tyden zamrzne. Zatim vzdy v noci,kdy neni vubec vytizeny.
V logu se pred zamrznutim objevy nasledujici:
Sep 15 23:40:09 samba kernel: ata1: command 0x35 timeout,stat 0x50

Pote system zamrzne, na konzoli je spousta nesrozumitelnych vypisu a musim na tvrdo resetovat.

Vypis z logu:
-------------

by (uid=0)

Sep 15 20:01:01 samba crond(pam_unix)[28644]: session closed for user root

Sep 15 21:01:01 samba crond(pam_unix)[28652]: session opened for user root
by (uid=0)

Sep 15 21:01:01 samba crond(pam_unix)[28652]: session closed for user root

Sep 15 21:20:10 samba kernel: ata1: command 0x35 timeout, stat 0x50
host_stat 0x1

Sep 15 22:01:01 samba crond(pam_unix)[28662]: session opened for user root
by (uid=0)

Sep 15 22:01:01 samba crond(pam_unix)[28662]: session closed for user root

Sep 15 23:01:01 samba crond(pam_unix)[28670]: session opened for user root
by (uid=0)

Sep 15 23:01:01 samba crond(pam_unix)[28670]: session closed for user root

Sep 15 23:40:09 samba kernel: ata1: command 0x35 timeout, stat 0x50
host_stat 0x1

Sep 16 00:01:01 samba crond(pam_unix)[28678]: session opened for user root
by (uid=0)

Sep 16 00:01:01 samba crond(pam_unix)[28678]: session closed for user root

Sep 16 00:17:42 samba kernel: ata1: command 0x35 timeout, stat 0x50
host_stat 0x1

Sep 16 01:01:01 samba crond(pam_unix)[28686]: session opened for user root
by (uid=0)

Sep 16 01:01:01 samba crond(pam_unix)[28686]: session closed for user root

Sep 16 06:43:03 samba syslogd 1.4.1: restart.

Sep 16 06:43:03 samba syslog: syslogd startup succeeded

Sep 16 06:43:03 samba syslog: klogd startup succeeded

-----------

Zkousel jsem vymenit HDD i reinstalovat system se stejnym vysledkem.
Stava se to posledni mesic, predtim ale server pul roku bezel bez problemu.

System: CentOS 4.0
Kernel: 2.6.9-5.0.3.EL (buildcentos@x8664-build)
HDD: S-ATA Seagate 200GB, ST3200822AS
MB: MSI MS-9130, AMD 64bit,dvouprocesorovy(osazen jednim CPU)
Integrovany S-ATA radic: VIA VT6420 SATA RAID Controler

Nevim kde hledat chybu? SW nebo HW?

Dekuji za pomoc.

F.Cerny

Dotaz: Zamrznuti systemu - VIA SATA, 200GB HDD