I copied a bit of data on my LVM based RAID1 (not hardware RAID) with 2xc3x97 10Tb hard drives:
/dev/mapper/users-users 9.1T 1.9G 8.6T 1% /home
and now it's killing my I/O to the point where my mouse, keyboard, video are blocked/unblocked/blocked/unblocked...
I'm thinking that maybe something is wrong at the hardware level but wondering what that could be. Wondering what to test first to try to make a better diagnostic.
I have another 2 drives in the same drive array but they are not setup in RAID mode.
Looking at the output of
iotop it tells me that there is about 2Mb/s written to disk, a pretty much permanent write... When I look at the Disk LED, I can see them come up and out over and over again and can hear the seeking heads too.
Trying to watch a video, it fails really bad. Choppy would not even be the word here. It's like one image every other second if even that much. So a really big I/O killer for the entire computer.
Wondering whether someone would have encountered such a problem before and what can be done to fix it if possible (I certainly hope it is possible!)
My motherboard is a Supermicro X11DPH-T and I also got a case from Supermicro the 745BAC-R1K28B2 4U Full Tower Chassis. I'm running Ubuntu 18.04 LTS. The server is new and so is the install (i.e. not an upgrade from 16.04 or who knows what...)
Would there be a way to know whether a specific hard drive or some other hardware device is causing the trouble?
The output of free. I'm not swapping, I barely use the 512Gb of RAM.
$ free -m total used free shared buff/cache available Mem: 515636 2676 510291 114 2668 509935 Swap: 30047 0 30047
And here is the output of
mdstat. It looks normal from what I know of raid.
$ cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid1 sdf1 sde1 9766302720 blocks super 1.2 [2/2] [UU] bitmap: 4/73 pages [16KB], 65536KB chunk unused devices: <none>
As for the CPUs, it's 2xc3x97 Xeon Silver 4216. That's 16 Core/CPU and I currently have Hyperthreading turned on so it looks like 64 CPUs.