Unraid and ZFS

[rmilyard]

I am working on converting my drives in Unraid server to ZFS.,  I copied all data from disk1 and converted to ZFS.  Now when copying data back only getting write speeds of 41.05 MB/s.  Seems slow.

[MAM59]

Welcome to the club!

Be warned, it will stay as low as it is (although, usually 80MB/s are normal).

 

ZFS is a killer for Unraid (when used within the array). The reason is still unknown, the only solution: GET BACK TO XFS or what you have used before!

see threads like

for more info about the desaster.

Edited July 19, 2023 by MAM59

[JorgeB]

See here:

 

[rmilyard]

So sounds like converting to ZFS isn't great idea right now?

[MAM59]

They say "some have it, some not".

 

So far they have no idea what triggers it and how it can be solved.

 

Therefore, staying away is a very wise idea.

 

I'm rolling back too, it is much too frustrating to see the box crawling like a snake...

 

[fritzdis]

On 7/19/2023 at 8:34 AM, rmilyard said:

So sounds like converting to ZFS isn't great idea right now?

Just in case you haven't already made your decision - I think it depends on use case.  The 2nd linked thread above was mine.  I still went ahead and converted all my drives, transferring 10s of TBs of data.  It was certainly slow, but it should be a one-time process.

 

I use SSD cache for most of my writes, with mover running daily.  I'm sure it's not running as fast as XFS would, but I don't care because it's invisible to me.