I have 4 WD Red drives, 2 in the array and 2 as parity (I don't need the space but had the drives, thought I might as well have a second parity). Anyway, the second parity drive was just installed last night. I have a nice Samsung 960 EVO SSD as cache, and I usually get 80-90 MBPS upload. I'm currently getting 15-20 MBPS and I can't figure out why. The parity isn't checking anymore and I don't see any other processes going on that would slow it down that drastically. But I'm no expert and easily could have missed something.

I have no ethernet connection from my PC to the server, it's all over wifi - but I have powerful 4x4 wifi on both the PC (a dedicated card and antenna) and the router and the wifi speed has never been my bottleneck. So I don't think that's the problem, though I could be wrong.

I've posted diagnostics, and any help would be much appreciated!

tower-diagnostics-20180512-0656.zip

 

EDIT: SEE NEW DIAGNOSTICS FURTHER DOWN

Edited May 12, 20188 yr by thinkscotty

Logs only show a few seconds after reboot. You should get diagnostics after you see the problem and before rebooting.

 

Do you mean the problems occurred after adding the 2nd parity, or did you add both parity and didn't have any parity before? Also, are you caching any user shares?

 

Assuming you already had parity and adding another disk is when the problems started, it's likely you disturbed connections on some disks and are just having connection problems. But we can't tell since nothing had happened yet in those short logs you gave us.

 

 

I would say whatever the problem is very unlikely related to the 2nd parity, with your hardware and so few disks there should be no perceptible difference with 1 or 2 parity disks, and if I understand correctly it's slow transferring to the cache drive, so parity is not even in use, my best guess would be the WiFi, test with iperf to check your real network bandwidth.

Do you have the cache drive turned on for each share that you want to use it for?    Using the cache drive for writes to the array will eliminate any 'slowest' due parity generation. 

 

First go to   Settings   >>>   Global Share Setting   >>>    Cache Settings   set use "Use cache disk:" to 'Yes'.   

 

Next click on     Shares,    click on the NAME of the share.  That should open up the Share Settings page. Make sure that the "Use cache disk:"  is set to 'Yes'.   You will have to do this for each share that you want to use the cache drive for!   

 

Make sure that you have the Mover setup.    Settings   >>>   Scheduler   >>>   Mover Settings   

What does disturbed connections mean, and how could I go about solving it? I'll post a new diagnostics file here. It's strange though, because my server is showing an up-time of 15 hours. Maybe I uploaded an earlier file. I'll re-download  and post here anyway. Thanks!

 

 

tower-diagnostics-20180512-0824(1).zip

Edited May 12, 20188 yr by thinkscotty

No those aren't new either. Are you going to Tools - Diagnostics and downloading the latest diagnostics?