Very Slow Transfer Speeds 14Mb/s

[Tom98]

Hi,

 

I'm having a weirdProblem with my Transfer Speeds.

I have two HDD HGST Enterprise Drives with should give me about 150Mb/s and they do when I do a Speed Test via the Terminal. And when I run a parity check I get about 110 -130 Mb/s but when I use SMB or the Mover I get betwenn 11 - 14 Mb/s.

 

I don't understand how that works and it is not a Problem with the Client or Network I have a Cache NVME and when I use that over SMB I get about 330-350 MB/s.

 

I run Unraid as a Virtual Maschine in Proxmox the Driver are Connected via a JBOD USB3.0 so that Unraid gets all the SMART Data and has direct Access 

 

Can Someone help? 

 

EDIT: When I Copy from Unraid to Client I get about 135 Mb/s so it's just Write Performance 

Edited July 25, 2022 by Tom98

[Tom98]

I Tried because it is VM to give it 15GB of RAM und 4 Cores but made it wores. 

10GB File 

First 3GB with 350MB/s and then 6MB/s

 

RAM is at 8% and CPU at about 32% while Coping 

[Squid]

You need to post your diagnostics and specify what share(s) you're seeing this on.

[trurl]

2 hours ago, Tom98 said:

run Unraid as a Virtual Maschine in Proxmox

And you may need to go to the Virtualizing Unraid subforum where others using Unraid in this unsupported way help each other. 

[UhClem]

You need to enable write cache (on those drives). See

man hdparm

 

[Tom98]

Hi, is that a Terminal Command? 

It says command not found but when I check with "hdparm -W /dev/sdb" it says Write-caching is on 

[UhClem]

Odd ... Your reported symptoms (only writing is slow; and speed @ 10-20 MB/sec) are precisely indicative of a drive's write-caching disabled. But, there's no arguing with your test result (-W saying w.c. is ON) [assuming that /dev/sdb IS one of the two slowpokes]

 

Back to "Plan A" ... maybe Squid & others can see something from your Diagnostics [upload].

 

Edited July 27, 2022 by UhClem