System Constantly Freezes with Ryzen x1700 and Ubuntu 18.04

Question

I ordered dedicated server with AMD Ryzen x1700, installed here Ubuntu 18.04

Kernel is 4.15.0-29-generic

There are 2x500SSD and 1x4000HDD, they are mounted and working. RAM 64GB.

root@159:~# fdisk -l

Disk /dev/sda: 477 GiB, 512110190592 bytes, 1000215216 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xf3b7577b

Device     Boot    Start        End   Sectors   Size Id Type
/dev/sda1           2048   67110911  67108864    32G 82 Linux swap / Solaris
/dev/sda2       67110912   68159487   1048576   512M 83 Linux
/dev/sda3       68159488 1000213167 932053680 444.4G 83 Linux


Disk /dev/sdb: 477 GiB, 512110190592 bytes, 1000215216 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sdc: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

root@159:~# free

              total        used        free      shared  buff/cache   available
Mem:       65985312     1111648    63810352       31760     1063312    64219256
Swap:      33554428           0    33554428

System freezes every day 1-3 times constantly in past week. Nothing suspicious in syslog / dmesg. The last time it happens, log screen (prev time - nothing) : http://prntscr.com/kjd2wl Just freeze, and becomes unreachable until hard reboot.

I checked hard drives via fsck -f, its fine.

Temperatures of CPU and hard drives are fine, server without load. Dont know what to check else. I already read many topics there, but nothing same with me, all topics are old or for older versions of kernel / ubuntu.

Answer 1

Problem solved. I ordered full hardware check, and hoster sent me review.

Dear Client,

Unfortunately your server crashed while the hardware check, so we decided to replace the sever, but reconnect the old drives.

Afterwards we checked your drives and saw that your 4 TB drive is broken and doesn't start any more. So please confirm the data loss to the drive.

Your server is now booted into the rescue System.

I will try to work with new hardware, if problem still here, I'll let to know.

Answer 2

After 2 days of work, server freezed again with new hard drive. Now they fixed BIOS and it works 2 days without freezes. Win?