Good day, my current setup is simple 4x 6TB 5900 rounds spin disks 2 parity 2 storage

2x1TB SSD caché disk in "Mirror"

 

I was able to transfer my files of different sizes with cache enabled, the speed transfer was 100MB/S when writing to RAM, then dropping to 0 intermitenly, the larges file was 80 GB.

 

 

Right now i am facing a problem, i have 3 200 GB backup files i am not able to transfer, the File Explorer fails at 50%

The transfer fails when there is a long time when the transfer stops at 0mb/s

 

I have tried to disable/enable cache and write directly to array, it fails, i have tried to use SCP instead, it fails.

 

From this point i dont really know if there is any way i can transfer files using unraid.

Is there any mode which enables minimal speed so the explorer do not fail ?

 

Thank you

 

 

 

Please post the diagnostics after a failed transfer attempt.

Good day, thank you for your reply, attaching diagnostics, last attempt was over scp, before that i have tried to transfer without cache via smb

tower-diagnostics-20230413-1801.zip

There are no logged errors that I can see, the array is using all SMR disks, so lower write performance and some stalls are expect, but it won't usually cause a timeout, do you have a non SMR disk you could use unassigned just to test?

20 hours ago, JorgeB said:

There are no logged errors that I can see, the array is using all SMR disks, so lower write performance and some stalls are expect, but it won't usually cause a timeout, do you have a non SMR disk you could use unassigned just to test?

Hello, i have expanded array with a one M.2 256 gb disk i have laying around, and created a share which only will use this disk, i have a stable transfer rate around 40mb/s which is to be expected with such disk, the transfer of 240 GB file finishes fine.

 

 

When i transfer with old array with /or without cache enabled, i got transfer fluctuations, at first i am at 100MB then dropping to 0, then up and down.

After some ~100gb time the transfer time outs.

Do you think if i buy 2 more 1 tb drives to make 4 x SSD 1TB RAID 10 cache, it will be better ? I dont remember if i can do raid 10 with cache.

 

Thank you

 

 

Edited April 14, 20233 yr by oldguy

A larger cache should help, and yes you can use raid10.

This is getting stranger an stranger,  2 of my 4 array disk decide to go down

 

 

I was trying to plug in an external USB hard drive during that process, have you encountered such behaviour ?

Rebuilding is in process 9 hours left.

 

All 4 disk are on the same port of the sas controller flashed in IT mode, i dont think it's a connector

 

 

 

 

26 minutes ago, oldguy said:

I was trying to plug in an external USB hard drive during that process, have you encountered such behaviour ?

That should not be a problem, diags if you didn't yet reboot could show more.

I have rebooted, well i suppose it teaches me to have another backup of backup )