멀쩡히 잘 돌아가던 서버가 갑자기 재시동되었는데,

 secure 로그나 messages 로그나 Webmin 로그를 살펴봤지만, 힌트가 될 만한 기록은 없고, 

boot.log 를 보는데, 어떻게 이해를 해야할 지 조언을 구합니다.

Dell R320 / CentOS 6.8 / Webmin 1.801 / Virtualmin GPL 5.03

하드는 SSD 250GB + 1TB 하드 2개 non-raid로 구성되어 있습니다.

%Gata_id[293]: HDIO_GET_IDENTITY failed for '/dev/sda'

ata_id[295]: HDIO_GET_IDENTITY failed for '/dev/sdb'

ata_id[297]: HDIO_GET_IDENTITY failed for '/dev/sdc'

  Welcome to [0;36mCentOS[0;39m
Starting udev: %Gata_id[701]: HDIO_GET_IDENTITY failed for '/dev/sda'

ata_id[706]: HDIO_GET_IDENTITY failed for '/dev/sdb'

ata_id[716]: HDIO_GET_IDENTITY failed for '/dev/sdc'

[60G[[0;32m  OK  [0;39m]

Setting hostname huso.kr:  [60G[[0;32m  OK  [0;39m]

Checking filesystems
/dev/sda6: clean, 15159/1281120 files, 280730/5120000 blocks
/dev/sda1: recovering journal
/dev/sda1: clean, 60/128016 files, 149322/512000 blocks
/dev/sda8: recovering journal
/dev/sdc1: recovering journal
/dev/sdb1: recovering journal
/dev/sda8: Clearing orphaned inode 20 (uid=27, gid=27, mode=0100600, size=0)
/dev/sda8: Clearing orphaned inode 19 (uid=27, gid=27, mode=0100600, size=0)
/dev/sda8: Clearing orphaned inode 18 (uid=27, gid=27, mode=0100600, size=0)
/dev/sda8: Clearing orphaned inode 16 (uid=27, gid=27, mode=0100600, size=0)
/dev/sda8: Clearing orphaned inode 13 (uid=27, gid=27, mode=0100600, size=0)
/dev/sda8: clean, 195/5808128 files, 411728/23217408 blocks
/dev/sda5: recovering journal
/dev/sdc1: clean, 75775/61054976 files, 4488702/244190208 blocks
/dev/sdb1: clean, 42524/61054976 files, 7724547/244190208 blocks
/dev/sda5: Clearing orphaned inode 916018 (uid=0, gid=0, mode=0100755, size=1383392)
/dev/sda5: clean, 160618/1602496 files, 808978/6400000 blocks
/dev/sda2: recovering journal
/dev/sda2: clean, 44/3203072 files, 247106/12800000 blocks
/dev/sda3: recovering journal
/dev/sda3: Clearing orphaned inode 786507 (uid=0, gid=0, mode=0140777, size=0)
/dev/sda3: Clearing orphaned inode 786506 (uid=0, gid=0, mode=0100600, size=0)
/dev/sda3: Clearing orphaned inode 786505 (uid=0, gid=0, mode=0100600, size=0)
/dev/sda3: clean, 7102/3203072 files, 437005/12800000 blocks
[60G[[0;32m  OK  [0;39m]

Remounting root filesystem in read-write mode:  [60G[[0;32m  OK  [0;39m]

Mounting local filesystems:  [60G[[0;32m  OK  [0;39m]

Enabling local filesystem quotas:  [60G[[0;32m  OK  [0;39m]

Enabling /etc/fstab swaps:  [60G[[0;32m  OK  [0;39m]

Entering non-interactive startup
ipset: Loaded with no configuration
ip6tables: No config file.[60G[[0;33mWARNING[0;39m]

iptables: Applying firewall rules: [60G[[0;32m  OK  [0;39m]

Bringing up loopback interface:  [60G[[0;32m  OK  [0;39m]

Bringing up interface em1:  Determining if ip address 112.216.156.205 is already in use for device em1...
[60G[[0;32m  OK  [0;39m]

Bringing up interface em2:  Determining if ip address 192.168.10.205 is already in use for device em2...
[60G[[0;32m  OK  [0;39m]

Starting auditd: [60G[[0;32m  OK  [0;39m]

Starting portreserve: [60G[[0;32m  OK  [0;39m]

Starting system logger: [60G[[0;32m  OK  [0;39m]

Starting system message bus: [60G[[0;32m  OK  [0;39m]

Setting network parameters... [60G[[0;32m  OK  [0;39m]

Starting NetworkManager daemon: [60G[[0;32m  OK  [0;39m]

Starting named: [60G[[0;32m  OK  [0;39m]

Mounting filesystems:  [60G[[0;32m  OK  [0;39m]

Starting HAL daemon: [60G[[0;32m  OK  [0;39m]

Retrigger failed udev events[60G[[0;32m  OK  [0;39m]

Starting kdump:[60G[[0;32m  OK  [0;39m]

Starting sshd: [60G[[0;32m  OK  [0;39m]

Starting mysqld:  [60G[[0;32m  OK  [0;39m]

Starting Dovecot Imap: [60G[[0;32m  OK  [0;39m]

Starting saslauthd: [60G[[0;32m  OK  [0;39m]

Starting postfix: [60G[[0;32m  OK  [0;39m]

Starting proftpd: [60G[[0;32m  OK  [0;39m]

Starting httpd: [Thu Jun 30 16:18:22 2016] [warn] module ssl_module is already loaded, skipping
httpd: Could not reliably determine the server's fully qualified domain name, using huso.kr for ServerName
[Thu Jun 30 16:18:22 2016] [warn] _default_ VirtualHost overlap on port 443, the first has precedence
[60G[[0;32m  OK  [0;39m]

Starting crond: [60G[[0;32m  OK  [0;39m]

Starting fail2ban: [60G[[0;32m  OK  [0;39m]