리눅스서버 다운현상으로 로그확인좀 부탁합니다.

리눅스 유저님들 안녕하세요...
사용중인 리눅스 서버가 다운현상이 보여 messages 파일 내용을 조금 올립니다.
정확히 몇시에 왜 죽었는지 고수님들의 조언 부탁드립니다.
감사합니다.
서버 = 레드햇엔트프라이즈3.0버젼


* messages 파일내용
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Aug  6 13:16:08 gw kernel: IA-32 Microcode Update Driver: v1.13 <tigran at veritas.com>
Aug  6 13:16:08 gw kernel: microcode: No suitable data for cpu 2
Aug  6 13:16:08 gw kernel: microcode: No suitable data for cpu 0
Aug  6 13:16:08 gw kernel: microcode: No suitable data for cpu 1
Aug  6 13:16:08 gw kernel: microcode: No suitable data for cpu 3
Aug  6 13:16:08 gw kernel: ip_tables: (C) 2000-2002 Netfilter core team
Aug  6 13:16:08 gw kernel: tg3.c:v3.10RH (September 14, 2004)
Aug  6 13:16:08 gw kernel: eth0: Tigon3 [partno(N/A) rev 2100 PHY(5704)] (PCIX:133MHz:64-bit)
10/100/1000BaseT Ethernet 00:12:79:d1:d6:cb
Aug  6 13:16:08 gw kernel: eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] Split[0] WireSpeed[1]
TSOcap[0]
Aug  6 13:16:08 gw kernel: eth1: Tigon3 [partno(N/A) rev 2100 PHY(5704)] (PCIX:133MHz:64-bit)
10/100/1000BaseT Ethernet 00:12:79:d1:d6:ca
Aug  6 13:16:08 gw kernel: eth1: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] Split[0] WireSpeed[1]
TSOcap[0]
Aug  6 13:16:08 gw kernel: ip_tables: (C) 2000-2002 Netfilter core team
Aug  6 13:16:08 gw kernel: tg3: eth0: Link is up at 100 Mbps, full duplex.
Aug  6 13:16:08 gw kernel: tg3: eth0: Flow control is off for TX and off for RX.
Aug  6 13:16:08 gw kernel: audit subsystem ver 0.1 initialized
Aug  6 13:16:08 gw kernel: lp: driver loaded but no devices found
Aug  6 13:16:08 gw kernel: usb.c: registered new driver serial
Aug  6 13:16:08 gw kernel: usbserial.c: USB Serial support registered for Generic
Aug  6 13:16:08 gw kernel: usbserial.c: USB Serial Driver core v1.4
Aug  6 13:16:11 gw login(pam_unix)[2444]: session opened for user root by LOGIN(uid=0)
Aug  6 13:16:11 gw  -- root[2444]: ROOT LOGIN ON tty1
Aug  6 13:22:23 gw login(pam_unix)[2444]: session closed for user root
Aug  7 04:02:09 gw cups: cupsd shutdown succeeded
Aug  7 04:02:10 gw cups: cupsd startup succeeded

* messages.1 내용
Aug  7 04:02:22 gw syslogd 1.4.1: restart.
Aug  7 07:52:32 gw syslogd 1.4.1: restart. =>다운확인후 시스템 재시작
Aug  7 07:52:32 gw syslog: syslogd startup succeeded
Aug  7 07:52:32 gw kernel: klogd 1.4.1, log source = /proc/kmsg started.
Aug  7 07:52:32 gw kernel: Linux version 2.4.21-27.ELsmp (bhcompile at bugs.build.redhat.com) (gcc
version 3.2.3 20030502 (Red Hat Linux 3.2.3-47)) #1 SMP Wed Dec 1 21:59:02 EST 2004
Aug  7 07:52:32 gw kernel: BIOS-provided physical RAM map:
Aug  7 07:52:32 gw kernel:  BIOS-e820: 0000000000000000 - 000000000009f400 (usable)
Aug  7 07:52:32 gw kernel:  BIOS-e820: 000000000009f400 - 00000000000a0000 (reserved)
Aug  7 07:52:32 gw kernel:  BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
Aug  7 07:52:32 gw kernel:  BIOS-e820: 0000000000100000 - 00000000dfff3000 (usable)
Aug  7 07:52:32 gw kernel:  BIOS-e820: 00000000dfff3000 - 00000000dfffb000 (ACPI data)
Aug  7 07:52:32 gw kernel:  BIOS-e820: 00000000dfffb000 - 00000000e0000000 (reserved)
Aug  7 07:52:32 gw kernel:  BIOS-e820: 00000000fec00000 - 00000000fed00000 (reserved)
Aug  7 07:52:32 gw kernel:  BIOS-e820: 00000000fee00000 - 00000000fee10000 (reserved)
Aug  7 07:52:32 gw kernel:  BIOS-e820: 00000000ffc00000 - 0000000100000000 (reserved)
Aug  7 07:52:32 gw syslog: klogd startup succeeded
Aug  7 07:52:32 gw kernel:  BIOS-e820: 0000000100000000 - 000000011bfff000 (usable)
Aug  7 07:52:32 gw kernel: 3647MB HIGHMEM available.
Aug  7 07:52:32 gw irqbalance: irqbalance startup succeeded
Aug  7 07:52:32 gw kernel: 896MB LOWMEM available.
Aug  7 07:52:33 gw kernel: found SMP MP-table at 000f4f80
Aug  7 07:52:33 gw kernel: hm, page 000f4000 reserved twice.
Aug  7 07:52:33 gw kernel: hm, page 000f5000 reserved twice.
Aug  7 07:52:33 gw kernel: hm, page 000ff000 reserved twice.
Aug  7 07:52:33 gw kernel: hm, page 00100000 reserved twice.
Aug  7 07:52:33 gw kernel: NX protection not present; using segment protection
Aug  7 07:52:33 gw kernel: On node 0 totalpages: 1163263
Aug  7 07:52:33 gw kernel: zone(0): 4096 pages.
Aug  7 07:52:33 gw kernel: zone(1): 225280 pages.
Aug  7 07:52:33 gw kernel: zone(2): 933887 pages.
Aug  7 07:52:33 gw kernel: ACPI: Searched entire block, no RSDP was found.
Aug  7 07:52:33 gw kernel: ACPI: RSDP located at physical address c00f4f00
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