Slow write speeds

[MiniTower]

Hello everyone,

 

i have set up a fresh install of Unraid with an array of 4 Drives+1Parity+1Cache. I also have a 1Gbs connection to the server, but after like 15 minutes i get non measurble transfer speeds like shown in picture down below. I have also tried without parity drive, without cache, other system also same issue. Also Turbo Write doesnt change a thing. No dockers are running just file transfer from a Win10 Machine. Sys Log files are also down below. 

 

Please HELP me i dont know what is wrong with my server.

tower-diagnostics-20230520-1907.zip

[Squid]

@dlandon

[dlandon]

There is a lot of this in your log:

May 20 10:07:14 Tower  smbd[32664]:   synthetic_pathref: opening [BILDER/DIV/_MG_1428.JPG] failed
May 20 10:07:15 Tower  smbd[32664]: [2023/05/20 10:07:15.260677,  0] ../../source3/smbd/files.c:1199(synthetic_pathref)
May 20 10:07:15 Tower  smbd[32664]:   synthetic_pathref: opening [BILDER/DIV/_MG_1429.CR2] failed
May 20 10:07:15 Tower  smbd[32664]: [2023/05/20 10:07:15.272700,  0] ../../source3/smbd/files.c:1199(synthetic_pathref)
May 20 10:07:15 Tower  smbd[32664]:   synthetic_pathref: opening [PLEX/FILME/poe-faf6-xvid.avi.mp4] failed
May 20 10:07:15 Tower  smbd[32664]: [2023/05/20 10:07:15.281814,  0] ../../source3/smbd/files.c:1199(synthetic_pathref)
May 20 10:07:15 Tower  smbd[32664]:   synthetic_pathref: opening [DOKUMENTE/3D Scanned/Scans/2020-12-31_10_48_30.skn/images/0000000000000000-0/view-00129198/calibration.yml] failed
May 20 10:07:17 Tower  smbd[32664]: [2023/05/20 10:07:17.601704,  0] ../../source3/smbd/files.c:1199(synthetic_pathref)
May 20 10:07:17 Tower  smbd[32664]:   synthetic_pathref: opening [DOKUMENTE/3D Scanned/Scans/2020-12-31_10_48_30.skn/images/0000000000000000-0/view-00129198/grabber-type] failed
May 20 10:07:19 Tower  smbd[32664]: [2023/05/20 10:07:19.054329,  0] ../../source3/smbd/files.c:1199(synthetic_pathref)
May 20 10:07:19 Tower  smbd[32664]:   synthetic_pathref: opening [BILDER/DIV/_MG_1429.JPG] failed
May 20 10:07:20 Tower  smbd[32664]: [2023/05/20 10:07:20.801702,  0] ../../source3/smbd/files.c:1199(synthetic_pathref)
May 20 10:07:20 Tower  smbd[32664]:   synthetic_pathref: opening [DOKUMENTE/3D Scanned/Scans/2020-12-31_10_48_30.skn/images/0000000000000000-0/view-00129198/rgb_pose.avs] failed
May 20 10:07:25 Tower  smbd[32664]: [2023/05/20 10:07:25.054177,  0] ../../source3/smbd/files.c:1199(synthetic_pathref)
May 20 10:07:25 Tower  smbd[32664]:   synthetic_pathref: opening [BILDER/DIV/_MG_1430.CR2] failed
May 20 10:07:31 Tower  smbd[32664]: [2023/05/20 10:07:31.099917,  0] ../../source3/smbd/files.c:1199(synthetic_pathref)
May 20 10:07:31 Tower  smbd[32664]:   synthetic_pathref: opening [DOKUMENTE/3D Scanned/Scans/2020-12-31_10_48_30.skn/images/0000000000000000-0/view-00129198/sensor_properties.txt] failed
May 20 10:07:39 Tower  smbd[32664]: [2023/05/20 10:07:39.930268,  0] ../../source3/smbd/files.c:1199(synthetic_pathref)
May 20 10:07:39 Tower  smbd[32664]:   synthetic_pathref: opening [BILDER/DIV/_MG_1430.JPG] failed
May 20 10:07:42 Tower  smbd[32664]: [2023/05/20 10:07:42.114140,  0] ../../source3/smbd/files.c:1199(synthetic_pathref)
May 20 10:07:42 Tower  smbd[32664]:   synthetic_pathref: opening [DOKUMENTE/3D Scanned/Scans/2020-12-31_10_48_30.skn/images/0000000000000000-0/view-00129198/serial] failed
May 20 10:07:48 Tower  smbd[32664]: [2023/05/20 10:07:48.657620,  0] ../../source3/smbd/files.c:1199(synthetic_pathref)
May 20 10:07:48 Tower  smbd[32664]:   synthetic_pathref: opening [BILDER/DIV/_MG_1431.CR2] failed

This is most likely causing your slow transfers.

 

Couple of things to try:

• Turn off the macOs Interoperability and see if that makes any difference.  I doubt it will.
• Use Tips and Tweaks to adjust disk caching.  If you left the defaults, you're probably OK.
• Replace your NIC or add a NIC..  You are using s Realtek NIC and they are known to be troublesome with Linux because the drivers are not well maintained.

[MiniTower]

Thank you for the reply,

i am trying all these steps right now.

I will report back if it helps.

Thank you

 

[MiniTower]

Hello Again,

I tried it and it is the same.

Ive tried another nic with 4 Ports (also realtek).

Checked the Tips and tweaks and turned off macos Interoperability.

[JorgeB]

Disks 1 and 2 are SMR, and from a model known so sometimes perform very slow, if you still don't have parity assigned make a share use disk 3 only, since that one in not SMR, and re-test.

[MiniTower]

4 minutes ago, JorgeB said:

Disks 1 and 2 are SMR, and from a model known so sometimes perform very slow, if you still don't have parity assigned make a share use disk 3 only, since that one in not SMR, and re-test.

This does not help me out.

I need to transfer about 12 TB of Data and Disk 3 is only 3TB

 

[JorgeB]

It will help confirm if the SMR disks are the problem, if they are obviously you'd need to get non SMR disks for better performance. 

[MiniTower]

29 minutes ago, JorgeB said:

It will help confirm if the SMR disks are the problem, if they are obviously you'd need to get non SMR disks for better performance. 

So i Have tried to copy direct to disk 3 and it works perfectly.

I also tried to disk 2 (8TB) and it works aswell

Why is it not working when i'm writing to the array?

[JorgeB]

And directly to disk1 is slow? Like mentioned some disks of that model can have particularly bad performance, much worse then regular SMR disks.

[MiniTower]

also disk 1 is perfectly fine with copy speeds

[JorgeB]

So what is the problem? Or are you using the disk shares? I mentioned trying the share with just disk3 included to force writes to that disk.

[MiniTower]

I have tried as you said a disk share to only drive 3 (CMR) which works perfectly fine i get like 100Mbis read/write (limitet through ethernet). Then i tried a disk share to Drive 2 (SMR) and it also worked like drive 3. Only when i write to the array of drives then it doesnt work see the first picture. Sometime transferspeed is good then after like 10minutes it drops to 0.

[MiniTower]

Now i have tried plugging in my External Drive via USB to the Server and copy it then to the array (User Share)

It was very fast for around 3 Hours and now i'm copying with ca 600kbps.

 

[MiniTower]

[JorgeB]

Like I mentioned before try using a user share with disk3 only, not a disk share since that will change other things, click on that share and set it to include disk3 only.