Hello, I'm having a few challenges

[segway]

I have an 8 year old desktop PC, Gigabyte mobo, Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz, 16 GB RAM, 3x8TB HDs, 3x3TB HDs, Gigabit net port. I've uploaded the hardware spec for further information. During a parity check it can take up to 24 hours, and the fastest write speeds I see are 150MB/s, which seems awful slow. Also when writing to the UNRAID over NFS from a Ubuntu 22.04 server the rsync starts at 200-300 MB/s but then slows down to 3.7 MB/sec and slower. Can anyone give me some suggestions on how to get more performance.

 

Thanks.

[JorgeB]

8 minutes ago, segway said:

and the fastest write speeds I see are 150MB/s, which seems awful slow.

That's not that slow, Unraid doesn't stripe disks, so it's limited to the speed of the slowest disk at any point, you can post the diags so we can see the hardware used.

 

9 minutes ago, segway said:

rsync starts at 200-300 MB/s but then slows down to 3.7 MB/sec

Is the parity sync/check done? If yes post the diags during a transfer, after it slows down.

 

[segway]

I uploaded the Hardware Diags from the Tools page, Here's the XML output.

 

 

[JorgeB]

5 minutes ago, segway said:

I uploaded the Hardware Diags from the Tools page, Here's the XML output.

We need the complete diagnostics zip.

[segway]

Tonight, I'll reboot, mount the Unraid volume, start an rsync. What do I do with the Downloaded zip file? Where can I post it?

 

Thanks.

[segway]

7 minutes ago, JorgeB said:

We need the complete diagnostics zip.

Is there a way to clean up Post #3, I thought that by using CODE markers it would have put the text in a scrollable window within the post, just trying to clean it up. Thanks.

[JorgeB]

48 minutes ago, segway said:

Where can I post it?

Here in the forum, just attach to your next post.

[segway]

I started the rsync last night, it was 300-500Mb/s, this morning it was reporting 3Kb/s.

tower-diagnostics-20240417-0721.zip

Edited April 17 by segway

[JorgeB]

According to the diags, there's no disk activity going on, I do see you have a SMR disk for parity, try unassigning parity to leave that disk out and retest.

[segway]

But can you see that the rsync processes are still running from the host? Besides the fact that the parity disk is a SMR disk, do you see anything else that would cause Unraid to stop? a SMR disk is just slower at writing from what I understand. Thanks.

Edited April 17 by segway

[JorgeB]

3 minutes ago, segway said:

do you see anything else that would cause Unraid to stop?

Nope, there's nothing out of the ordinary logged.

[segway]

Tonight I'll disable the parity drive, reboot, restart the rsync. See what its like in the morning. Is there any other logging I should turn on?

[JorgeB]

Any errors should be logged in the syslog, but if a device is just being extra slow, but without timing out, nothing will be logged.

[segway]

It appears much faster removing the SMR parity HD, the rsync completed by morning. Have to purchase a new CMR 8TB HD to replace it.

 

I am seeing an error, rsync: [receiver] chgrp "/disk4/4K/.Doctor.Strange.mkv" failed: Operation not permitted (1).

 

Are there some NFS permissions I need to set on UNRAID to alleviate this error?

 

Thanks. 

tower-diagnostics-20240418-0642.zip

[JorgeB]

May no be a permissions issue, try renaming the file, remove the starting .