Seagate 8TB Archive Drive in FreeNAS?

[Doug183]

What are those TCP/IP tuning? I struggle with getting my connection running consistency.

 

[Rainwulf]

If you are doing any kind of writing, ANY kind, even just a few bytes any longer then a minute it will get inconsistent, especially as the drives fill up. With data in the write cache track the drives pretty well ignore you until that data is safely written to the SMR tracks, and if that means a rewrite of a track it will do it.


These are my system tunables that helped flatten out my transfers though:

ignore kmem size, and the l2arc settings if you dont have one. the arc_max depends on your ram size.

As well, you want to turn of any kind of of writing of last accessed updates to the array unless you need them.
Thats a setting on the host computers though.

This is my CIFS settings:

ea support = no
store dos attributes = no
map archive = no
map hidden = no
map readonly = no
map system = no

I also enabled readahead in the share properties, ideal for media servers as it reads a huge chunk then goes back to other things, gives the drives time for their house keeping and any write access.

 

[Doug183]

Great thanks!

Are there any settings on your client side that you tuned?

 

[Rainwulf]

these following applied as an administrator in a command prompt or with a batch file.

netsh int tcp set global congestion=none

netsh int tcp set global autotuning=disabled

netsh int tcp set global rss=disabled

netsh int ip set global taskoffload=disabled



copy the following into a text file, rename as a .reg file, and run it.


Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Multimedia\SystemProfile]
"NetworkThrottlingIndex"=dword:ffffffff
"SystemResponsiveness"=dword:00000014

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Explorer]
“DisableThumbsDBOnNetworkFolders”=dword:00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Executive]
"AdditionalCriticalWorkerThreads"=dword:000000064
"AdditionalDelayedWorkerThreads"=dword:00000064

 

[Z300M]

My gigantic array is nearly 2 years old now.
Current setup is still a xeon E3-1220 with 16 gig of ram.

16 8tb drives in a single(!) vdev Raid Z2. 92.0 tb all up.
...

Wow! They persuaded me that even 14 drives in RaidZ3 wasn't a good idea, so I configured them as two 7-drive RaidZ2 vdevs.

 

[Rainwulf]

Yea its not exactly a standard config. It works though.