I have ~500 GB of data that I need to transfer to my CentOS 7 home server.During the transfer it will shutoff and reboot, sometimes in emergency mode and sometimes not. I took a peek into /var/log/messages and found nothing of importaince. This issuehas been present since I installed CentOS on this machine but as it is not often for large transfers to be done, It hasn't really been an issue. CentOS has been installed on this machine about 3 months and this is the only issues I have had thus far. Here is what I have looked at. df -h checking free spaceCode:
$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 55G 2.8G 50G 6% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 8.6M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/md126p1 5.5T 1.5T 4.1T 26% /home
$ free -m Checking RAM usageCode:
$ free -m
total used free shared buffers cached
Mem: 7815 503 7311 8 10 291
-/+ buffers/cache: 202 7613
Swap: 0 0 0
No shutdown errors that I was able to find. snippet from /var/log/messages Code:
Dec 27 11:33:30 hostname auditd[595]: Audit daemon rotating log files
Dec 27 12:01:01 hostname systemd: Created slice user-0.slice.
Dec 27 12:01:01 hostname systemd: Starting Session 7 of user root.
Dec 27 12:01:01 hostname systemd: Started Session 7 of user root.
Dec 27 13:01:01 hostname systemd: Created slice user-0.slice.
Dec 27 13:01:01 hostname systemd: Starting Session 8 of user root.
Dec 27 13:01:01 hostname systemd: Started Session 8 of user root.
Dec 27 13:58:14 hostname kernel: md: md126: resync done.
Dec 27 14:01:01 hostname systemd: Created slice user-0.slice.
Dec 27 14:01:01 hostname systemd: Starting Session 9 of user root.
Dec 27 14:01:01 hostname systemd: Started Session 9 of user root.
Dec 27 14:15:05 hostname auditd[595]: Audit daemon rotating log files
Dec 27 15:01:02 hostname systemd: Created slice user-0.slice.
Dec 27 15:01:02 hostname systemd: Starting Session 10 of user root.
Dec 27 15:01:02 hostname systemd: Started Session 10 of user root.
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
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^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@Dec 27 15:21:09 hostname rsyslogd: [origin software="rsyslogd" swVersion="7.4.7" x-pid="672" x-info="http://www.rsyslog.com"] start
Dec 27 15:19:53 hostname journal: Runtime journal is using 8.0M (max 390.7M, leaving 586.1M of free 3.8G, current limit 390.7M).
Dec 27 15:19:53 hostname kernel: CPU0 microcode updated early to revision 0x4, date = 2013-06-28
Dec 27 15:19:53 hostname kernel: Initializing cgroup subsys cpuset
Dec 27 15:19:53 hostname kernel: Initializing cgroup subsys cpu
Dec 27 15:19:53 hostname kernel: Initializing cgroup subsys cpuacct
Dec 27 15:19:53 hostname kernel: Linux version 3.10.0-123.13.2.el7.x86_64 ([email protected]) (gcc version 4.8.2 20140120 (Red Hat 4.8.2-16) (GCC) )
# 1 SMP Thu Dec 18 14:09:13 UTC 2014
Dec 27 15:19:53 hostname kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-123.13.2.el7.x86_64 root=UUID=dd8e0383-702c-4ebd-a647-60291af56b4e ro vconsole.keymap=us crashkernel=auto vconsole.font=latarcyrheb-sun16 rhgb quiet LANG=en_US.UTF-8
Dec 27 15:19:53 hostname kernel: e820: BIOS-provided physical RAM map:
$ cat /proc/mdstat Check what the raid is doing, as far as I know this is fine.Code:
$ cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md126 : active raid5 sdc[3] sdd[2] sde[1] sdf[0]
5860536320 blocks super external:/md127/0 level 5, 16k chunk, algorithm 0 [4/4] [UUUU]
md127 : inactive sdf[3](S) sde[2](S) sdc[1](S) sdd[0](S)
9040 blocks super external:imsm
unused devices: <none>
$ ip addr Good IP informationCode:
$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens132: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 00:1f:bc:01:ee:2d brd ff:ff:ff:ff:ff:ff
3: ens133: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:1f:bc:01:ee:2c brd ff:ff:ff:ff:ff:ff
inet 192.168.1.74/24 brd 192.168.1.255 scope global dynamic ens133
valid_lft 83772sec preferred_lft 83772sec
inet6 fe80::21f:bcff:fe01:ee2c/64 scope link
valid_lft forever preferred_lft forever
$ sudo ethtool ens133 Eth settings seem correctCode:
$ sudo ethtool ens133
Settings for ens133:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: No
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: pg
Wake-on: d
Current message level: 0x000000ff (255)
drv probe link timer ifdown ifup rx_err tx_err
Link detected: yes
packet loss results Code:
$ ping -q -c 100 -i 0.2 google.com
# No packet loss present to internet
PING google.com (64.233.176.139) 56(84) bytes of data.
--- google.com ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time 19832ms
rtt min/avg/max/mdev = 40.569/41.830/43.095/0.526 ms
ANOTHERMACHINE$ ping 192.168.1.74 -i 0.2 -c 100 -q
# No packet loss to the server from sending machine
PING 192.168.1.74 (192.168.1.74) 56(84) bytes of data.
--- 192.168.1.74 ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time 19800ms
rtt min/avg/max/mdev = 0.283/0.321/0.480/0.031 ms
I was unable to post journalctl -xb results due to character constraints, If you think some of that information should help, please let me know what the grep of it and I'll provide it. Any ideas where else I should start looking? | 
