Whats my bottleneck (if any)

[danimal86]

I'm 3 days into my trial license and i'm trying to see if this is a good fit over my WD MyCloud DL4100 (with 4-3tb Reds in Raid 5).  

Backstory: I have a bunch of random drives i've got from a friend in IT.  8-2tb's, 4-1tb's, and 4-3tb (currently in the nas box).  I figured unraid would be an option to put them to use.  Until my 8 port pci sata card is here this weekend, i'm just using 6 of the 2tb drives without a cache ssd.  I had an 120gb m.2 as a cache but it was getting toasty and kept throwing warnings, even with a 120mm fan blowing on it.  When i was using it, i was seeing nice 100mbps transfer speeds.

 

I'm copy over my media library and i'm getting about 30mbps, as shown on the windows transfer screen.  It is being copied from the nas box over to unraid.  Is this normal or should i see some faster write speeds?  When i first started the 1.75tb copy, it was going at around 80-90mbps for a few seconds and then it settled down to 30.  

 

Any help/advice would be greatly appreciated.  

 

I've attached a diagnostic zip file for reference (taken during the transfer).  Let me know if there's any additional info needed 

tower-diagnostics-20200409-1440.zip

Edited April 9, 2020 by danimal86

[trurl]

 

[danimal86]

7 minutes ago, trurl said:

 

Well that was quick.  Thanks for that!  Went from 30mbps and went to 100 for a short while and now is down to 80mbps.  

Anything else i can look at?

 

[Squid]

Consider installing Fix Common Problems.  I suspect that write cache may be disabled on those drives which will significantly slow them down (FCP will let you know).  Available within Apps which also means to install Community Applications

[danimal86]

26 minutes ago, Squid said:

Consider installing Fix Common Problems.  I suspect that write cache may be disabled on those drives which will significantly slow them down (FCP will let you know).  Available within Apps which also means to install Community Applications

Here's what i got from Fix Common Problems. 

 

[Squid]

OK  Write cache is enabled so you're good there.  

[danimal86]

5 minutes ago, Squid said:

OK  Write cache is enabled so you're good there.  

Ok. 

Its been fluctuating from around 75 to 95.  Seem about right?

 

[Squid]

More or less.  You are using a 2TB Green which isn't exactly the fastest drive around

[danimal86]

7 minutes ago, Squid said:

More or less.  You are using a 2TB Green which isn't exactly the fastest drive around

Yeah i think 2 or 3 of the 2tb'ers are greens.  

[danimal86]

14 minutes ago, Squid said:

More or less.  You are using a 2TB Green which isn't exactly the fastest drive around

here's a question, would it be better/worse/doesnt matter to have one of the greens as a parity drive?

[Squid]

All writes to a drive are limited in speed by the speed of the parity disk and the disk being written to.  Since you've got 7200s in the array, you're best having a 7200 as a parity drive.

 

 

[danimal86]

Can you change the parity drive?

[Squid]

You can rebuild it onto any other drive you may have.  If you want to swap it with a data drive, then you can google "unRaid Parity Swap", but I've never had a reason to do that.

[danimal86]

40 minutes ago, Squid said:

You can rebuild it onto any other drive you may have.  If you want to swap it with a data drive, then you can google "unRaid Parity Swap", but I've never had a reason to do that.

Thanks.  I'll look into this.