I have to tell you guys that unRAID community is amazing, helping people that fast and offering tools like FCP that could adresse basic issues like this is really cool.

Thanks to all participants  

 

Cheers !

That's great, can you also make sure it's detected for SAS devices? It uses sdparm which is now included with v6.7:
https://forums.unraid.net/topic/72862-drive-write-speeds-really-slow-solved/
 

Is there ANY adverse effects from running hdparm -W /dev/sdx on a SAS device?

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6 minutes ago, Squid said:

Is there ANY adverse effects from running hdparm -W /dev/sdx on a SAS device?

It will give an error, but can't see any harm being caused.

The setting does not persist with reboot, is there a way to make it permanent?

14 minutes ago, yendi said:

The setting does not persist with reboot, is there a way to make it permanent?

I suspected that, best bet for now it to have a user script on array startup enabling it, hopefully LT will enable it for all array drives in the future.

1 hour ago, johnnie.black said:

I suspected that, best bet for now it to have a user script on array startup enabling it, hopefully LT will enable it for all array drives in the future.

Could you direct me on how to do it?

Thanks

Install user scripts plugin, create a new script with just the hdparm command and schedule it to run at first array start.

 

Note that if you change any hardware the sd identifier can change, though you can use sd* to run the command on all devices, it won't cause any harm.

Will try this, thanks !!

Can I just add this command to the Go file? I already have a command in there to disable ACPI power meter to fix the log getting spammed with error messages.

 

6 minutes ago, psykix said:

Can I just add this command to the Go file?

Yes, but I would still recommend user scripts since there's a large chance you forget about adding it in the future, if it's no longer needed, though in this case it shouldn't cause any issues.