问题严重，请指点！！

HP 360G5 服务器+红帽AS 5.2+ squid 运行一段时间后系统死机，ILO 黑屏， ping不通，系统没有任何反映，以下是message的log 请高手分析，兄弟多谢了。

Nov 16 04:02:04 localhost syslogd 1.4.1: restart.
Nov 17 09:48:23 localhost kernel: hda: status error: status=0x20 { DeviceFault }
Nov 17 09:48:23 localhost kernel: ide: failed opcode was: unknown
Nov 17 09:48:23 localhost kernel: hda: DMA disabled
Nov 17 09:48:23 localhost kernel: hda: ATAPI reset complete
Nov 17 09:48:23 localhost kernel: hda: status error: status=0x7f { DriveReady DeviceFault SeekComplete DataRequest CorrectedError Index Error }
Nov 17 09:48:23 localhost kernel: hda: status error: error=0x7f { IllegalLengthIndication EndOfMedia AbortedCommand MediaChangeRequested LastFailedSense=0x07 }
Nov 17 09:48:23 localhost kernel: ide: failed opcode was: unknown
Nov 17 09:48:23 localhost kernel: hda: drive not ready for command
Nov 17 09:48:23 localhost kernel: hda: ATAPI reset complete
Nov 17 09:48:23 localhost kernel: hda: status error: status=0x20 { DeviceFault }
Nov 17 09:48:23 localhost kernel: ide: failed opcode was: unknown
Nov 17 09:48:23 localhost kernel: hda: status error: status=0x20 { DeviceFault }
Nov 17 09:48:23 localhost kernel: ide: failed opcode was: unknown